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Full vulnerability report · 2026
CVE-2026-30922High confidence

pyasn1 Vulnerable to Denial of Service via Unbounded Recursion

pyasn1 · pyasn1

Official source article: GitHub GHSA-JR27-M4P2-RC6R ↗. Check the applicable product and release in the original source.

7.5HighCVSS 3.1
Recommended action
Within 7 days

High technical severity with public exploit material referenced by a structured source; prioritise exposed affected systems while verifying vendor guidance.

Patch available
R
Operational reassessment

Published severity in operational context

Open reassessment dashboard →
Published severityHighOperational priority:Critical, raised one band.upgradedsince 17 Sep 2026

Evidence used

  • No CISA KEV confirmation is currently recorded.
  • A structured source references public exploit or proof-of-concept material.
  • The selected CVSS metric records a network-reachable, unauthenticated path with no user interaction.
  • EPSS is 0.93% for the current model date.

Compensating controls

  • Validate the affected product branch and deploy the verified fixed release.
  • Restrict the affected network interface to trusted sources where business-safe.
  • Increase monitoring for the attack path and post-exploitation behaviour described in the report.

Verification

  1. Confirm that the asset runs pyasn1 pyasn1 and falls inside the recorded affected range.
  2. Verify the installed build against the product-specific fixed version after deployment.
  3. Validate exposure, authentication requirements and compensating controls in the actual environment.
  4. Reopen this reassessment when CVSS, KEV, EPSS, exploit evidence or remediation changes.
Mitigation target: Within 3 daysRemediation target: Within 90 days

This automated reassessment organises public evidence. It does not know asset exposure, business impact or control effectiveness and does not replace CVSS or a human risk decision.

Distribution package intelligence

Release-specific package status

Debian, ubuntu findings are scoped to the named distribution, release and source package. An absent finding does not mean a package is unaffected.

5 package states
Repository candidate not checked

A published vendor fix does not prove that a matching update is enabled and installable on a particular asset. Confirm the local package candidate before scheduling remediation.

Distribution releaseSource packageVendor stateFixed versionEvidence
Debian trixietrixie · sourcepyasn1Vendor fix publishedDebian records a fixed source-package version for this release.0.6.1-1+deb13u2Debian Security Tracker ↗Source updated 5 Oct 2026
Debian bookwormbookworm · sourcepyasn1Vendor fix publishedDebian records a fixed source-package version for this release.0.4.8-3+deb12u2Debian Security Tracker ↗Source updated 5 Oct 2026
Debian forkyforky · sourcepyasn1Vendor fix publishedDebian records a fixed source-package version for this release.0.6.3-1Debian Security Tracker ↗Source updated 5 Oct 2026
Debian sidsid · sourcepyasn1Vendor fix publishedDebian records a fixed source-package version for this release.0.6.3-1Debian Security Tracker ↗Source updated 5 Oct 2026
Ubuntu 24.04 LTSnoble · standard archivepyasn1Vendor fix publishedCanonical reports that a fixed source package version has been published. Repository candidate availability is not checked by BlackTree.0.4.8-4ubuntu0.2Canonical Ubuntu Security ↗Source updated 5 Oct 2026
Open-source package ranges1 source-attributed range

These OSV and GitHub advisory ranges apply only to the named package and ecosystem. A listed fixed version is not a universal product patch or proof that an update is installed.

Ecosystem and packageAffected rangeFirst fixed versionEvidence
pippyasn1<= 0.6.20.6.3GitHub advisory ↗upstream repository advisory · 9 Sep 2026
Direct vendor intelligence

Authoritative vendor CSAF and VEX advisories

Structured product status and remediation from the issuing vendor. Product-state explanations are always visible; large lists can be searched or downloaded.

1 current
CVE-2026-30922 · CSAF 2.0 · revision 3 · finalRed Hat Product Securitypyasn1: pyasn1 Vulnerable to Denial of Service via Unbounded Recursion
26 known affected

The vendor explicitly identifies these products as affected by this CVE.

  • rhmtc/openshift-migration-rhel8-operator as a component of Migration Toolkit for Containers
  • migration-toolkit-virtualization/mtv-rhel9-operator as a component of Migration Toolkit for Virtualization
  • mtv-candidate/mtv-rhel9-operator as a component of Migration Toolkit for Virtualization
  • openshift-lightspeed/lightspeed-service-api-rhel9 as a component of OpenShift Lightspeed
  • openshift-lightspeed/lightspeed-to-dataverse-exporter-rhel9 as a component of OpenShift Lightspeed
  • rhaiis/vllm-tpu-rhel9 as a component of Red Hat AI Inference Server
  • ansible-automation-platform-24/ee-minimal-rhel8 as a component of Red Hat Ansible Automation Platform 2
  • ansible-automation-platform-24/ee-minimal-rhel9 as a component of Red Hat Ansible Automation Platform 2
  • ansible-automation-platform-24/ee-supported-rhel9 as a component of Red Hat Ansible Automation Platform 2
  • ansible-automation-platform-25/ee-minimal-rhel9 as a component of Red Hat Ansible Automation Platform 2
  • ansible-automation-platform-25/ee-supported-rhel9 as a component of Red Hat Ansible Automation Platform 2
  • ansible-automation-platform-25/lightspeed-chatbot-rhel8 as a component of Red Hat Ansible Automation Platform 2
Summary
An unbounded recursion flaw has been discovered in the pypi pyasn1 library. This uncontrolled recursion occurs when decoding ASN.1 data with deeply nested structures. An attacker can supply a crafted payload containing nested SEQUENCE (0x30) or SET (0x31) tags with Indefinite Length (0x80) markers. This forces the decoder to recursively call itself until the Python interpreter crashes with a RecursionError or consumes all available memory (OOM), crashing the host application.
Remediation
For details on how to apply this update, refer to Ansible Automation Platform documentation.
Optional official sources

National CERT insights
?CERT means Computer Emergency Response Team; CSIRT is the closely related term Computer Security Incident Response Team.

Choose official national sources for this report. Each advisory shows its original language. Your selection is remembered on this device and included in shared links.

Official European source

ENISA European Vulnerability Database

Official EUVD identifiers, advisory evidence and known-exploited context. Missing fields are not treated as evidence of low risk.

1 current
ENISA EUVD identifier

EUVD-2026-12747

No EUVD known-exploited evidence

pyasn1 is a generic ASN.1 library for Python. Prior to 0.6.3, the `pyasn1` library is vulnerable to a Denial of Service (DoS) attack caused by uncontrolled recursion when decoding ASN.1 data with deeply nested structures. An attacker can supply a crafted payload containing thousands of nested `SEQUENCE` (`0x30`) or `SET` (`0x31`) tags with "Indefinite Length" (`0x80`) markers. This forces the decoder to recursively call itself until the Python interpreter crashes with a `RecursionError` or consumes all available memory (OOM), crashing the host application. This is a distinct vulnerability from CVE-2026-23490 (which addressed integer overflows in OID decoding). The fix for CVE-2026-23490 (`MAX_OID_ARC_CONTINUATION_OCTETS`) does not mitigate this recursion issue. Version 0.6.3 fixes this specific issue.

EUVD state
Present in the current official mapping
Known exploitation
Not present in the current ENISA EUVD known-exploited dataset. This is not proof of no exploitation.
ENISA score
7.5 · CVSS 3.1
Advisory evidence
No linked advisory details stored yet
Recommended actionWithin 7 days

High technical severity with public exploit material referenced by a structured source; prioritise exposed affected systems while verifying vendor guidance.

Patch available
01

What, why and how

pyasn1 is a generic ASN.1 library for Python. Prior to 0.6.3, the `pyasn1` library is vulnerable to a Denial of Service (DoS) attack caused by uncontrolled recursion when decoding ASN.1 data with deeply nested structures. An attacker can supply a crafted payload containing thousands of nested `SEQUENCE` (`0x30`) or `SET` (`0x31`) tags with "Indefinite Length" (`0x80`) markers. This forces the decoder to recursively call itself until the Python interpreter crashes with a `RecursionError` or consumes all available memory (OOM), crashing the host application. This is a distinct vulnerability from CVE-2026-23490 (which addressed integer overflows in OID decoding). The fix for CVE-2026-23490 (`MAX_OID_ARC_CONTINUATION_OCTETS`) does not mitigate this recursion issue. Version 0.6.3 fixes this specific issue.

What

pyasn1 is a generic ASN.1 library for Python. Prior to 0.6.3, the `pyasn1` library is vulnerable to a Denial of Service (DoS) attack caused by uncontrolled recursion when decoding ASN.1 data with deeply nested structures. An attacker can supply a crafted payload containing thousands of nested `SEQUENCE` (`0x30`) or `SET` (`0x31`) tags with "Indefinite Length" (`0x80`) markers. This forces the decoder to recursively call itself until the Python interpreter crashes with a `RecursionError` or consumes all available memory (OOM), crashing the host application. This is a distinct vulnerability from CVE-2026-23490 (which addressed integer overflows in OID decoding). The fix for CVE-2026-23490 (`MAX_OID_ARC_CONTINUATION_OCTETS`) does not mitigate this recursion issue. Version 0.6.3 fixes this specific issue.

Why

The product does not properly control the amount of recursion that takes place, consuming excessive resources, such as allocated memory or the program stack.

How

An attacker operating through a network path may attempt exploitation without authentication or user interaction. If successful, the issue may disrupt the affected service.

What

pyasn1 is a generic ASN.1 library for Python. Prior to 0.6.3, the `pyasn1` library is vulnerable to a Denial of Service (DoS) attack caused by uncontrolled recursion when decoding ASN.1 data with deeply nested structures. An attacker can supply a crafted payload containing thousands of nested `SEQUENCE` (`0x30`) or `SET` (`0x31`) tags with "Indefinite Length" (`0x80`) markers. This forces the decoder to recursively call itself until the Python interpreter crashes with a `RecursionError` or consumes all available memory (OOM), crashing the host application. This is a distinct vulnerability from CVE-2026-23490 (which addressed integer overflows in OID decoding). The fix for CVE-2026-23490 (`MAX_OID_ARC_CONTINUATION_OCTETS`) does not mitigate this recursion issue. Version 0.6.3 fixes this specific issue.

Why

The product does not properly control the amount of recursion that takes place, consuming excessive resources, such as allocated memory or the program stack.

How

An attacker operating through a network path may attempt exploitation without authentication or user interaction. If successful, the issue may disrupt the affected service.

02

Exploit reality and attack path

CVSS severity, EPSS forecast probability, public exploit material and CISA-confirmed exploitation are separate signals.

Observed exploitation
?Confirmed exploitation and public exploit material are separate signals. Attacks can occur without public proof-of-concept or exploit code.
No confirmed evidence

No CISA KEV match was present at the last successful refresh. This means no confirmation from that source, not proof of no exploitation.

Public PoC / exploit material
?Confirmed exploitation and public exploit material are separate signals. Attacks can occur without public proof-of-concept or exploit code.
Reference recorded

A structured CVE source labels at least one public reference as exploit material. BlackTree has not independently validated that it is safe, reliable or weaponised.

Likely attack path
a network path → Uncontrolled Recursion → disrupt the affected service
Attack surface
Network
Privileges required
None: unauthenticated exploitation is possible
User interaction
None
Attack complexity
Low: no specialised conditions are recorded
Security boundary
Unchanged: impact remains within the vulnerable component's security authority
Weakness
?CWE means Common Weakness Enumeration: a standard category for the underlying weakness.
CWE-674 ↗

CWE-674: Uncontrolled Recursion. The product does not properly control the amount of recursion that takes place, consuming excessive resources, such as allocated memory or the program stack.

CVSS vector
?CVSS means Common Vulnerability Scoring System. The vector records the metric values used to calculate technical severity.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Common Vulnerability Scoring System 3.1: the compact vector below is decoded into plain language.

AVNetworkAttack vector: The vulnerable component can be reached over a network.ACLowAttack complexity: No specialised conditions are required beyond attacker-controlled input.PRNonePrivileges required: The attacker does not need an account or existing privileges.UINoneUser interaction: No action by another user is required.SUnchangedScope: The security impact remains within the vulnerable component's authority.CNoneConfidentiality impact: No direct loss is represented by this metric.INoneIntegrity impact: No direct loss is represented by this metric.AHighAvailability impact: A successful attack can cause a major loss.
Post-exploitation / living off the land
No specific living-off-the-land technique is confirmed in the structured sources. Monitor normal administration tools for activity inconsistent with the affected service's baseline.
NetworkUnauthenticatedDenial of serviceCWE-674Public exploit reference
A

Official authority intelligence

Only matched European and national findings are included. Language selectors and unavailable sources are omitted.

ENISA EUVD · EUVD-2026-12747Official EUVD mapping

pyasn1 is a generic ASN.1 library for Python. Prior to 0.6.3, the `pyasn1` library is vulnerable to a Denial of Service (DoS) attack caused by uncontrolled recursion when decoding ASN.1 data with deeply nested structures. An attacker can supply a crafted payload containing thousands of nested `SEQUENCE` (`0x30`) or `SET` (`0x31`) tags with "Indefinite Length" (`0x80`) markers. This forces the decoder to recursively call itself until the Python interpreter crashes with a `RecursionError` or consumes all available memory (OOM), crashing the host application. This is a distinct vulnerability from CVE-2026-23490 (which addressed integer overflows in OID decoding). The fix for CVE-2026-23490 (`MAX_OID_ARC_CONTINUATION_OCTETS`) does not mitigate this recursion issue. Version 0.6.3 fixes this specific issue.

Official EUVD record ↗
BSI · German · WID-SEC-2026-2933Splunk SOAR: Mehrere Schwachstellen

Ein Angreifer kann mehrere Schwachstellen in Splunk SOAR ausnutzen, um Sicherheitsvorkehrungen zu umgehen, um Informationen offenzulegen, um Dateien zu manipulieren, um einen SQL-Injection Angriff durchzuführen, um einen Cross-Site Scripting Angriff durchzuführen, und um beliebigen Programmcode auszuführen.

Official advisory ↗
BSI · German · WID-SEC-2026-2437Oracle Communications: Mehrere Schwachstellen

Ein entfernter, anonymer oder authentisierter Angreifer kann mehrere Schwachstellen in Oracle Communications ausnutzen, um die Vertraulichkeit, Integrität und Verfügbarkeit zu gefährden.

Official advisory ↗
BSI · German · WID-SEC-2026-1007IBM App Connect Enterprise: Mehrere Schwachstellen

Ein Angreifer kann mehrere Schwachstellen in IBM App Connect Enterprise ausnutzen, um Sicherheitsvorkehrungen zu umgehen, um einen Denial of Service Angriff durchzuführen, um Informationen offenzulegen, um Dateien zu manipulieren, um einen Cross-Site Scripting Angriff durchzuführen, um einen SQL-Injection Angriff durchzuführen, und um beliebigen Programmcode auszuführen.

Official advisory ↗
BSI · German · WID-SEC-2026-0935Red Hat Ansible Automation Platform: Mehrere Schwachstellen

Ein entfernter, anonymer Angreifer kann mehrere Schwachstellen in Red Hat Ansible Automation Platform ausnutzen, um einen Denial of Service Angriff durchzuführen, beliebigen Code auszuführen, Sicherheitsmaßnahmen zu umgehen, Daten zu manipulieren, vertrauliche Informationen offenzulegen oder Cross-Site-Scripting-Angriffe durchzuführen.

Official advisory ↗
Cyber Security Agency of Singapore · English · CSA-SB-20260325Security Bulletin 25 Mar 2026

The Cyber Security Agency of Singapore included this CVE in its official Security Bulletin 25 Mar 2026, published on 25 March 2026. Open the linked bulletin for the product, severity and reference information published in that issue.

Official advisory ↗
CERT-FR · French · CERTFR-2026-AVI-1206Multiples vulnérabilités dans les produits IBM

ord?id=CVE-2026-26007 Référence CVE CVE-2026-26996 https://www.cve.org/CVERecord?id=CVE-2026-26996 Référence CVE CVE-2026-27024 https://www.cve.org/CVERecord?id=CVE-2026-27024 Référence CVE CVE-2026-27025 https://www.cve.org/CVERecord?id=CVE-2026-27025 Référence CVE CVE-2026-27026 https://www.cve.org/CVERecord?id=CVE-2026-27026 Référence CVE CVE-2026-27205 https://www.cve.org/CVERecord?id=CVE-2026-27205 Référence CVE CVE-2026-27903 https://www.cve.org/CVERecord?id=CVE-2026-27903 Référence CVE CVE-2026-27904 https://www.cve.org/CVERecord?id=CVE-2026-27904 Référence CVE CVE-2026-2950 https://www.cve.org/CVERecord?id=CVE-2026-2950 Référence CVE CVE-2026-30922 https://www.cve.org/CVERecord?id=CVE-2026-30922 Référence CVE CVE-2026-31958 https://www.cve.org/CVERecord?id=CVE-2026-31958 Référence CVE CVE-2026-33230 https://www.cve.org/CVERecord?id=CVE-2026-33230 Référence CVE CVE-2026-33231 https://www.cve.org/CVERecord?id=CVE-2026-33231 Référence CVE CVE-2026-33236 https://www.cve.org/CVERecord?id=CVE-2026-33236 Référence CVE CVE-2026-33416 https://www.cve.org/CVERecord?id=CVE-2026-33416 Référence CVE CVE-2026-34073 https://www.cve.org/CVERecord?id=CVE-2026-34073 Référence CVE CVE-2026-34197 https://www.cve.org/CVERecord?id=CVE-2026-34197 Référence CVE CVE-2026-34268 https://www.cve.org/CVERecord?id=

Official advisory ↗
CERT-FR · French · CERTFR-2026-AVI-1056Multiples vulnérabilités dans les produits Splunk

ord?id=CVE-2026-28388 Référence CVE CVE-2026-28389 https://www.cve.org/CVERecord?id=CVE-2026-28389 Référence CVE CVE-2026-28390 https://www.cve.org/CVERecord?id=CVE-2026-28390 Référence CVE CVE-2026-28684 https://www.cve.org/CVERecord?id=CVE-2026-28684 Référence CVE CVE-2026-28753 https://www.cve.org/CVERecord?id=CVE-2026-28753 Référence CVE CVE-2026-28755 https://www.cve.org/CVERecord?id=CVE-2026-28755 Référence CVE CVE-2026-29063 https://www.cve.org/CVERecord?id=CVE-2026-29063 Référence CVE CVE-2026-29181 https://www.cve.org/CVERecord?id=CVE-2026-29181 Référence CVE CVE-2026-2950 https://www.cve.org/CVERecord?id=CVE-2026-2950 Référence CVE CVE-2026-30922 https://www.cve.org/CVERecord?id=CVE-2026-30922 Référence CVE CVE-2026-31789 https://www.cve.org/CVERecord?id=CVE-2026-31789 Référence CVE CVE-2026-31790 https://www.cve.org/CVERecord?id=CVE-2026-31790 Référence CVE CVE-2026-31898 https://www.cve.org/CVERecord?id=CVE-2026-31898 Référence CVE CVE-2026-31938 https://www.cve.org/CVERecord?id=CVE-2026-31938 Référence CVE CVE-2026-31958 https://www.cve.org/CVERecord?id=CVE-2026-31958 Référence CVE CVE-2026-32141 https://www.cve.org/CVERecord?id=CVE-2026-32141 Référence CVE CVE-2026-32280 https://www.cve.org/CVERecord?id=CVE-2026-32280 Référence CVE CVE-2026-32281 https://www.cve.org/CVERecord?id=

Official advisory ↗
CERT-FR · French · CERTFR-2026-AVI-0901Multiples vulnérabilités dans les produits IBM

ord?id=CVE-2026-27459 Référence CVE CVE-2026-27903 https://www.cve.org/CVERecord?id=CVE-2026-27903 Référence CVE CVE-2026-27904 https://www.cve.org/CVERecord?id=CVE-2026-27904 Référence CVE CVE-2026-27980 https://www.cve.org/CVERecord?id=CVE-2026-27980 Référence CVE CVE-2026-28684 https://www.cve.org/CVERecord?id=CVE-2026-28684 Référence CVE CVE-2026-29057 https://www.cve.org/CVERecord?id=CVE-2026-29057 Référence CVE CVE-2026-29063 https://www.cve.org/CVERecord?id=CVE-2026-29063 Référence CVE CVE-2026-2950 https://www.cve.org/CVERecord?id=CVE-2026-2950 Référence CVE CVE-2026-29786 https://www.cve.org/CVERecord?id=CVE-2026-29786 Référence CVE CVE-2026-30922 https://www.cve.org/CVERecord?id=CVE-2026-30922 Référence CVE CVE-2026-31802 https://www.cve.org/CVERecord?id=CVE-2026-31802 Référence CVE CVE-2026-31958 https://www.cve.org/CVERecord?id=CVE-2026-31958 Référence CVE CVE-2026-3304 https://www.cve.org/CVERecord?id=CVE-2026-3304 Référence CVE CVE-2026-33227 https://www.cve.org/CVERecord?id=CVE-2026-33227 Référence CVE CVE-2026-33532 https://www.cve.org/CVERecord?id=CVE-2026-33532 Référence CVE CVE-2026-33671 https://www.cve.org/CVERecord?id=CVE-2026-33671 Référence CVE CVE-2026-33672 https://www.cve.org/CVERecord?id=CVE-2026-33672 Référence CVE CVE-2026-33750 https://www.cve.org/CVERecord?id=CV

Official advisory ↗
CERT-FR · French · CERTFR-2026-AVI-0667Multiples vulnérabilités dans les produits IBM

ord?id=CVE-2026-27904 Référence CVE CVE-2026-27942 https://www.cve.org/CVERecord?id=CVE-2026-27942 Référence CVE CVE-2026-27980 https://www.cve.org/CVERecord?id=CVE-2026-27980 Référence CVE CVE-2026-28417 https://www.cve.org/CVERecord?id=CVE-2026-28417 Référence CVE CVE-2026-28421 https://www.cve.org/CVERecord?id=CVE-2026-28421 Référence CVE CVE-2026-29057 https://www.cve.org/CVERecord?id=CVE-2026-29057 Référence CVE CVE-2026-29063 https://www.cve.org/CVERecord?id=CVE-2026-29063 Référence CVE CVE-2026-2950 https://www.cve.org/CVERecord?id=CVE-2026-2950 Référence CVE CVE-2026-29786 https://www.cve.org/CVERecord?id=CVE-2026-29786 Référence CVE CVE-2026-30922 https://www.cve.org/CVERecord?id=CVE-2026-30922 Référence CVE CVE-2026-30951 https://www.cve.org/CVERecord?id=CVE-2026-30951 Référence CVE CVE-2026-31402 https://www.cve.org/CVERecord?id=CVE-2026-31402 Référence CVE CVE-2026-31431 https://www.cve.org/CVERecord?id=CVE-2026-31431 Référence CVE CVE-2026-31802 https://www.cve.org/CVERecord?id=CVE-2026-31802 Référence CVE CVE-2026-31808 https://www.cve.org/CVERecord?id=CVE-2026-31808 Référence CVE CVE-2026-31988 https://www.cve.org/CVERecord?id=CVE-2026-31988 Référence CVE CVE-2026-32141 https://www.cve.org/CVERecord?id=CVE-2026-32141 Référence CVE CVE-2026-32597 https://www.cve.org/CVERecord?id=

Official advisory ↗
CERT-FR · French · CERTFR-2026-AVI-0556Multiples vulnérabilités dans les produits VMware

d?id=CVE-2026-27141 Référence CVE CVE-2026-27142 https://www.cve.org/CVERecord?id=CVE-2026-27142 Référence CVE CVE-2026-27143 https://www.cve.org/CVERecord?id=CVE-2026-27143 Référence CVE CVE-2026-27144 https://www.cve.org/CVERecord?id=CVE-2026-27144 Référence CVE CVE-2026-27199 https://www.cve.org/CVERecord?id=CVE-2026-27199 Référence CVE CVE-2026-27205 https://www.cve.org/CVERecord?id=CVE-2026-27205 Référence CVE CVE-2026-27456 https://www.cve.org/CVERecord?id=CVE-2026-27456 Référence CVE CVE-2026-29129 https://www.cve.org/CVERecord?id=CVE-2026-29129 Référence CVE CVE-2026-29145 https://www.cve.org/CVERecord?id=CVE-2026-29145 Référence CVE CVE-2026-30922 https://www.cve.org/CVERecord?id=CVE-2026-30922 Référence CVE CVE-2026-3219 https://www.cve.org/CVERecord?id=CVE-2026-3219 Référence CVE CVE-2026-32274 https://www.cve.org/CVERecord?id=CVE-2026-32274 Référence CVE CVE-2026-32280 https://www.cve.org/CVERecord?id=CVE-2026-32280 Référence CVE CVE-2026-32281 https://www.cve.org/CVERecord?id=CVE-2026-32281 Référence CVE CVE-2026-32282 https://www.cve.org/CVERecord?id=CVE-2026-32282 Référence CVE CVE-2026-32283 https://www.cve.org/CVERecord?id=CVE-2026-32283 Référence CVE CVE-2026-32286 https://www.cve.org/CVERecord?id=CVE-2026-32286 Référence CVE CVE-2026-32288 https://www.cve.org/CVERecord?id=CV

Official advisory ↗
CERT-FR · French · CERTFR-2026-AVI-0376Multiples vulnérabilités dans les produits Microsoft

mars 2026 Date de la dernière version 30 mars 2026 Source(s) Bulletin de sécurité Microsoft CVE-2026-23244 du 19 mars 2026 Bulletin de sécurité Microsoft CVE-2026-23245 du 19 mars 2026 Bulletin de sécurité Microsoft CVE-2026-23246 du 19 mars 2026 Bulletin de sécurité Microsoft CVE-2026-23253 du 20 mars 2026 Bulletin de sécurité Microsoft CVE-2026-23268 du 20 mars 2026 Bulletin de sécurité Microsoft CVE-2026-23269 du 20 mars 2026 Bulletin de sécurité Microsoft CVE-2026-23271 du 21 mars 2026 Bulletin de sécurité Microsoft CVE-2026-23274 du 21 mars 2026 Bulletin de sécurité Microsoft CVE-2026-23277 du 21 mars 2026 Bulletin de sécurité Microsoft CVE-2026-30922 du 21 mars 2026 Bulletin de sécurité Microsoft CVE-2026-23100 du 22 mars 2026 Bulletin de sécurité Microsoft CVE-2026-4437 du 22 mars 2026 Bulletin de sécurité Microsoft CVE-2026-4438 du 22 mars 2026 Bulletin de sécurité Microsoft CVE-2025-69720 du 25 mars 2026 Bulletin de sécurité Microsoft CVE-2026-2369 du 25 mars 2026 Bulletin de sécurité Microsoft CVE-2026-23279 du 26 mars 2026 Bulletin de sécurité Microsoft CVE-2026-23281 du 26 mars 2026 Bulletin de sécurité Microsoft CVE-2026-23284 du 26 mars 2026 Bulletin de sécurité Microsoft CVE-2026-23285 du 26 mars 2026 Bulletin de sécurité Microsoft CVE-2026-23286 du 26 mars 2026 Bulletin de sécu

Official advisory ↗
JVN iPedia · Japanese · JVNDB-2026-008132pyasn1 maintenance organizationのASN.1 library for Pythonにおける再帰制御に関する脆弱性

pyasn1はPython向けの汎用ASN.1ライブラリです。バージョン0.6.3以前のpyasn1ライブラリには、深くネストされた構造を持つASN.1データをデコードする際に制御されていない再帰が発生し、サービス拒否攻撃（DoS）に対して脆弱な問題があります。攻撃者はIndefinite Length（0x80）マーカーを持つ何千ものネストされたSEQUENCE（0x30）またはSET（0x31）タグを含む細工されたペイロードを供給できます。これによって、デコーダは自身を再帰的に呼び出し続け、PythonインタプリタがRecursionErrorでクラッシュするか、利用可能なメモリをすべて消費してホストアプリケーションをクラッシュさせてしまいます。この問題はOIDデコードにおける整数オーバーフローに対処した修正とは異なり、その修正ではこの再帰問題は緩和されません。この問題はバージョン0.6.3で修正されています。

Official advisory ↗
03

Patch and workaround

Operational remediation based on structured source evidence.

Status
?Patch availability is based on structured fixed-version fields and authoritative update references. If no fix is verified, check the vendor advisory before making a change.
Patch available
Affected
Fixed
Action
For details on how to apply this update, refer to Ansible Automation Platform documentation.
Workaround
No verified workaround is recorded. If business-safe, reduce exposure to the affected interface and allow only trusted sources until authoritative guidance is available.
04

Evidence and provenance

Published 18 Mar 2026 · Last source change 17 Sept 2026, 12:04 UTC · CWE-674 · Uncontrolled Recursion

CVE recordCVE.org · 5.2
CVSS sourceCNA
EPSS source
?The date BlackTree first stored a score for this CVE from the daily FIRST EPSS feed.
FIRST · tracked since 2026-08-14
European sourceENISA EUVD · EUVD-2026-12747
Product sourceVendor CSAF · Red Hat Product Security
Remediation sourceVendor CSAF · Red Hat Product Security
CWE sourceCNA
NVD statusNVD modified after enrichment

Core structured fields are present and their contributing authorities are shown above.

Material change intelligence

What changed after publication

View recent updates ↗
  1. Vendor guidanceAuthoritative vendor guidance changed: removed vendor advisory: access.redhat.com/RHSA-2026:65126.
    Before
    patch: github.com/25ad481c19fdb006e20485ef3fc2e5b3eff30ef0 · remediation: github.com/25ad481c19fdb006e20485ef3fc2e5b3eff30ef0 · vendor advisory: access.redhat.com/RHSA-2026:65126 · 1 more references
    After
    patch: github.com/25ad481c19fdb006e20485ef3fc2e5b3eff30ef0 · remediation: github.com/25ad481c19fdb006e20485ef3fc2e5b3eff30ef0 · vendor advisory: github.com/GHSA-jr27-m4p2-rc6r
    security-advisories@github.com ↗
  2. Vendor guidanceAuthoritative vendor guidance changed: added vendor advisory: access.redhat.com/RHSA-2026:65126.
    Before
    patch: github.com/25ad481c19fdb006e20485ef3fc2e5b3eff30ef0 · remediation: github.com/25ad481c19fdb006e20485ef3fc2e5b3eff30ef0 · vendor advisory: github.com/GHSA-jr27-m4p2-rc6r
    After
    patch: github.com/25ad481c19fdb006e20485ef3fc2e5b3eff30ef0 · remediation: github.com/25ad481c19fdb006e20485ef3fc2e5b3eff30ef0 · vendor advisory: access.redhat.com/RHSA-2026:65126 · 1 more references
    security-advisories@github.com ↗
  3. Affected versionsThe structured affected or fixed version information changed.
    Before
    rhmtc/openshift-migration-rhel8-operator as a component of Migration Toolkit for Containers; migration-toolkit-virtualization/mtv-rhel9-operator as a component of Migration Toolkit for Virtualization; mtv-candidate/mtv-rhel9-operator as a component of Migration Toolkit for Virtualization; openshift-lightspeed/lightspeed-service-api-rhel9 as a component of OpenShift Lightspeed; openshift-lightspeed/lightspeed-to-dataverse-exporter-rhel9 as a component of OpenShift Lightspeed; rhaiis/vllm-tpu-rhel9 as a component of Red Hat AI Inference Server; ansible-automation-platform-24/ee-minimal-rhel8 as a component of Red Hat Ansible Automation Platform 2; ansible-automation-platform-24/ee-minimal-rhel9 as a component of Red Hat Ansible Automation Platform 2; ansible-automation-platform-24/ee-supported-rhel9 as a component of Red Hat Ansible Automation Platform 2; ansible-automation-platform-25/ee-minimal-rhel9 as a component of Red Hat Ansible Automation Platform 2; ansible-automation-platform-25/ee-supported-rhel9 as a component of Red Hat Ansible Automation Platform 2; ansible-automation-platform-25/lightspeed-chatbot-rhel8 as a component of Red Hat Ansible Automation Platform 2; ansible-automation-platform-26/controller-rhel9 as a component of Red Hat Ansible Automation Platform 2; ansible-automation-platform-26/ee-supported-rhel9 as a component of Red Hat Ansible Automation Platform 2; ansible-automation-platform-26/hub-rhel9 as a component of Red Hat Ansible Automation Platform 2; rhoai/odh-feature-server-rhel9 as a component of Red Hat OpenShift AI (RHOAI); rhoai/odh-llama-stack-core-rhel9 as a component of Red Hat OpenShift AI (RHOAI); rhoai/odh-ml-pipelines-runtime-generic-rhel9 as a component of Red Hat OpenShift AI (RHOAI); rhoai/odh-mlflow-rhel9 as a component of Red Hat OpenShift AI (RHOAI); rhoai/odh-training-cuda128-torch29-py312-rhel9 as a component of Red Hat OpenShift AI (RHOAI); openshift4/ose-ansible-operator as a component of Red Hat OpenShift Container Platform 4; openshift4/ose-ansible-rhel9-operator as a component of Red Hat OpenShift Container Platform 4; openshift4/ztp-site-generate-rhel8 as a component of Red Hat OpenShift Container Platform 4; satellite/iop-advisor-engine-rhel9 as a component of Red Hat Satellite 6; satellite/iop-insights-engine-rhel9 as a component of Red Hat Satellite 6; rhtas/segment-reporting-rhel9 as a component of Red Hat Trusted Artifact Signer · Fixed: automation-controller-venv-tower-0:4.6.29-2.el8ap.aarch64 as a component of Red Hat Ansible Automation Platform 2.5 for RHEL 8; automation-controller-venv-tower-0:4.6.29-2.el8ap.ppc64le as a component of Red Hat Ansible Automation Platform 2.5 for RHEL 8; automation-controller-venv-tower-0:4.6.29-2.el8ap.s390x as a component of Red Hat Ansible Automation Platform 2.5 for RHEL 8; automation-controller-venv-tower-0:4.6.29-2.el8ap.x86_64 as a component of Red Hat Ansible Automation Platform 2.5 for RHEL 8; python3.12-pyasn1-0:0.6.3-1.el8ap.noarch as a component of Red Hat Ansible Automation Platform 2.5 for RHEL 8; python3.12-pyasn1-0:0.6.3-1.el8ap.src as a component of Red Hat Ansible Automation Platform 2.5 for RHEL 8; automation-controller-venv-tower-0:4.6.29-2.el9ap.aarch64 as a component of Red Hat Ansible Automation Platform 2.5 for RHEL 9; automation-controller-venv-tower-0:4.6.29-2.el9ap.ppc64le as a component of Red Hat Ansible Automation Platform 2.5 for RHEL 9; automation-controller-venv-tower-0:4.6.29-2.el9ap.s390x as a component of Red Hat Ansible Automation Platform 2.5 for RHEL 9; automation-controller-venv-tower-0:4.6.29-2.el9ap.x86_64 as a component of Red Hat Ansible Automation Platform 2.5 for RHEL 9; python3.12-pyasn1-0:0.6.3-1.el9ap.noarch as a component of Red Hat Ansible Automation Platform 2.5 for RHEL 9; python3.12-pyasn1-0:0.6.3-1.el9ap.src as a component of Red Hat Ansible Automation Platform 2.5 for RHEL 9; automation-controller-0:4.7.12-1.el9ap.src as a component of Red Hat Ansible Automation Platform 2.6 for RHEL 9; automation-controller-cli-0:4.7.12-1.el9ap.noarch as a component of Red Hat Ansible Automation Platform 2.6 for RHEL 9; automation-controller-0:4.7.12-1.el9ap.aarch64 as a component of Red Hat Ansible Automation Platform 2.6 for RHEL 9; automation-controller-0:4.7.12-1.el9ap.ppc64le as a component of Red Hat Ansible Automation Platform 2.6 for RHEL 9; automation-controller-0:4.7.12-1.el9ap.s390x as a component of Red Hat Ansible Automation Platform 2.6 for RHEL 9; automation-controller-0:4.7.12-1.el9ap.x86_64 as a component of Red Hat Ansible Automation Platform 2.6 for RHEL 9; automation-controller-server-0:4.7.12-1.el9ap.noarch as a component of Red Hat Ansible Automation Platform 2.6 for RHEL 9; automation-controller-ui-0:4.7.12-1.el9ap.noarch as a component of Red Hat Ansible Automation Platform 2.6 for RHEL 9; automation-controller-venv-tower-0:4.7.12-1.el9ap.aarch64 as a component of Red Hat Ansible Automation Platform 2.6 for RHEL 9; automation-controller-venv-tower-0:4.7.12-1.el9ap.ppc64le as a component of Red Hat Ansible Automation Platform 2.6 for RHEL 9; automation-controller-venv-tower-0:4.7.12-1.el9ap.s390x as a component of Red Hat Ansible Automation Platform 2.6 for RHEL 9; automation-controller-venv-tower-0:4.7.12-1.el9ap.x86_64 as a component of Red Hat Ansible Automation Platform 2.6 for RHEL 9; python3.12-pyasn1-0:0.6.3-1.el9ap.noarch as a component of Red Hat Ansible Automation Platform 2.6 for RHEL 9; python3.12-pyasn1-0:0.6.3-1.el9ap.src as a component of Red Hat Ansible Automation Platform 2.6 for RHEL 9; fence-agents-0:4.16.0-5.el10_0.9.src as a component of Red Hat Enterprise Linux AppStream EUS (v. 10.0); fence-agents-aliyun-0:4.16.0-5.el10_0.9.x86_64 as a component of Red Hat Enterprise Linux AppStream EUS (v. 10.0); fence-agents-all-0:4.16.0-5.el10_0.9.aarch64 as a component of Red Hat Enterprise Linux AppStream EUS (v. 10.0); fence-agents-all-0:4.16.0-5.el10_0.9.ppc64le as a component of Red Hat Enterprise Linux AppStream EUS (v. 10.0); and 1666 more
    After
    rhmtc/openshift-migration-rhel8-operator as a component of Migration Toolkit for Containers; migration-toolkit-virtualization/mtv-rhel9-operator as a component of Migration Toolkit for Virtualization; mtv-candidate/mtv-rhel9-operator as a component of Migration Toolkit for Virtualization; openshift-lightspeed/lightspeed-service-api-rhel9 as a component of OpenShift Lightspeed; openshift-lightspeed/lightspeed-to-dataverse-exporter-rhel9 as a component of OpenShift Lightspeed; rhaiis/vllm-tpu-rhel9 as a component of Red Hat AI Inference Server; ansible-automation-platform-24/ee-minimal-rhel8 as a component of Red Hat Ansible Automation Platform 2; ansible-automation-platform-24/ee-minimal-rhel9 as a component of Red Hat Ansible Automation Platform 2; ansible-automation-platform-24/ee-supported-rhel9 as a component of Red Hat Ansible Automation Platform 2; ansible-automation-platform-25/ee-minimal-rhel9 as a component of Red Hat Ansible Automation Platform 2; ansible-automation-platform-25/ee-supported-rhel9 as a component of Red Hat Ansible Automation Platform 2; ansible-automation-platform-25/lightspeed-chatbot-rhel8 as a component of Red Hat Ansible Automation Platform 2; ansible-automation-platform-26/controller-rhel9 as a component of Red Hat Ansible Automation Platform 2; ansible-automation-platform-26/ee-supported-rhel9 as a component of Red Hat Ansible Automation Platform 2; ansible-automation-platform-26/hub-rhel9 as a component of Red Hat Ansible Automation Platform 2; rhoai/odh-feature-server-rhel9 as a component of Red Hat OpenShift AI (RHOAI); rhoai/odh-llama-stack-core-rhel9 as a component of Red Hat OpenShift AI (RHOAI); rhoai/odh-ml-pipelines-runtime-generic-rhel9 as a component of Red Hat OpenShift AI (RHOAI); rhoai/odh-mlflow-rhel9 as a component of Red Hat OpenShift AI (RHOAI); rhoai/odh-training-cuda128-torch29-py312-rhel9 as a component of Red Hat OpenShift AI (RHOAI); openshift4/ose-ansible-operator as a component of Red Hat OpenShift Container Platform 4; openshift4/ose-ansible-rhel9-operator as a component of Red Hat OpenShift Container Platform 4; openshift4/ztp-site-generate-rhel8 as a component of Red Hat OpenShift Container Platform 4; satellite/iop-advisor-engine-rhel9 as a component of Red Hat Satellite 6; satellite/iop-insights-engine-rhel9 as a component of Red Hat Satellite 6; rhtas/segment-reporting-rhel9 as a component of Red Hat Trusted Artifact Signer · Fixed: automation-controller-venv-tower-0:4.6.29-2.el8ap.aarch64 as a component of Red Hat Ansible Automation Platform 2.5 for RHEL 8; automation-controller-venv-tower-0:4.6.29-2.el8ap.ppc64le as a component of Red Hat Ansible Automation Platform 2.5 for RHEL 8; automation-controller-venv-tower-0:4.6.29-2.el8ap.s390x as a component of Red Hat Ansible Automation Platform 2.5 for RHEL 8; automation-controller-venv-tower-0:4.6.29-2.el8ap.x86_64 as a component of Red Hat Ansible Automation Platform 2.5 for RHEL 8; python3.12-pyasn1-0:0.6.3-1.el8ap.noarch as a component of Red Hat Ansible Automation Platform 2.5 for RHEL 8; python3.12-pyasn1-0:0.6.3-1.el8ap.src as a component of Red Hat Ansible Automation Platform 2.5 for RHEL 8; automation-controller-venv-tower-0:4.6.29-2.el9ap.aarch64 as a component of Red Hat Ansible Automation Platform 2.5 for RHEL 9; automation-controller-venv-tower-0:4.6.29-2.el9ap.ppc64le as a component of Red Hat Ansible Automation Platform 2.5 for RHEL 9; automation-controller-venv-tower-0:4.6.29-2.el9ap.s390x as a component of Red Hat Ansible Automation Platform 2.5 for RHEL 9; automation-controller-venv-tower-0:4.6.29-2.el9ap.x86_64 as a component of Red Hat Ansible Automation Platform 2.5 for RHEL 9; python3.12-pyasn1-0:0.6.3-1.el9ap.noarch as a component of Red Hat Ansible Automation Platform 2.5 for RHEL 9; python3.12-pyasn1-0:0.6.3-1.el9ap.src as a component of Red Hat Ansible Automation Platform 2.5 for RHEL 9; automation-controller-0:4.7.12-1.el9ap.src as a component of Red Hat Ansible Automation Platform 2.6 for RHEL 9; automation-controller-cli-0:4.7.12-1.el9ap.noarch as a component of Red Hat Ansible Automation Platform 2.6 for RHEL 9; automation-controller-0:4.7.12-1.el9ap.aarch64 as a component of Red Hat Ansible Automation Platform 2.6 for RHEL 9; automation-controller-0:4.7.12-1.el9ap.ppc64le as a component of Red Hat Ansible Automation Platform 2.6 for RHEL 9; automation-controller-0:4.7.12-1.el9ap.s390x as a component of Red Hat Ansible Automation Platform 2.6 for RHEL 9; automation-controller-0:4.7.12-1.el9ap.x86_64 as a component of Red Hat Ansible Automation Platform 2.6 for RHEL 9; automation-controller-server-0:4.7.12-1.el9ap.noarch as a component of Red Hat Ansible Automation Platform 2.6 for RHEL 9; automation-controller-ui-0:4.7.12-1.el9ap.noarch as a component of Red Hat Ansible Automation Platform 2.6 for RHEL 9; automation-controller-venv-tower-0:4.7.12-1.el9ap.aarch64 as a component of Red Hat Ansible Automation Platform 2.6 for RHEL 9; automation-controller-venv-tower-0:4.7.12-1.el9ap.ppc64le as a component of Red Hat Ansible Automation Platform 2.6 for RHEL 9; automation-controller-venv-tower-0:4.7.12-1.el9ap.s390x as a component of Red Hat Ansible Automation Platform 2.6 for RHEL 9; automation-controller-venv-tower-0:4.7.12-1.el9ap.x86_64 as a component of Red Hat Ansible Automation Platform 2.6 for RHEL 9; python3.12-pyasn1-0:0.6.3-1.el9ap.noarch as a component of Red Hat Ansible Automation Platform 2.6 for RHEL 9; python3.12-pyasn1-0:0.6.3-1.el9ap.src as a component of Red Hat Ansible Automation Platform 2.6 for RHEL 9; fence-agents-0:4.16.0-5.el10_0.9.src as a component of Red Hat Enterprise Linux AppStream EUS (v. 10.0); fence-agents-aliyun-0:4.16.0-5.el10_0.9.x86_64 as a component of Red Hat Enterprise Linux AppStream EUS (v. 10.0); fence-agents-all-0:4.16.0-5.el10_0.9.aarch64 as a component of Red Hat Enterprise Linux AppStream EUS (v. 10.0); fence-agents-all-0:4.16.0-5.el10_0.9.ppc64le as a component of Red Hat Enterprise Linux AppStream EUS (v. 10.0); and 1692 more
    Red Hat Product Security ↗
  4. Affected versionsThe structured affected or fixed version information changed.
    Before
    < 0.6.3 · Fixed: An authoritative update reference is available, but the fixed version is not recorded in the structured CVE fields. Check the linked vendor advisory for the applicable release.
    After
    pyasn1: < 0.6.3 · Fixed: RHSA-2026:24761: Red Hat Ansible Automation Platform 2.5 for RHEL 8, Red Hat Ansible Automation Platform 2.5 for RHEL 9
    CNA ↗
Material fields only · duplicate refreshes suppressed · history retained for the configured operational retention period
CVE published
Fixed release or patch reference recorded
ENISA EUVD · EUVD-2026-12747↗Vendor CSAF · Red Hat Product Security↗CISA Vulnrichment SSVC evidence↗Public exploit reference · GitHub GHSA-JR27-M4P2-RC6R↗Patch or update reference↗Official CVE record (CNA and ADP data)↗NVD record↗
Technical terms and abbreviations used in this report
CVE
Common Vulnerabilities and Exposures: the public identifier for one disclosed vulnerability.
CVSS
Common Vulnerability Scoring System: a technical severity framework; it is not patching priority by itself.
EPSS
Exploit Prediction Scoring System: FIRST's estimate of the probability that exploitation activity will be observed in the next 30 days; it is a forecast, not confirmation.
CWE
Common Weakness Enumeration: the standard category describing the underlying software or hardware weakness.
CNA
CVE Numbering Authority: an organisation authorised to assign and publish CVE records.
CISA ADP
Cybersecurity and Infrastructure Security Agency Authorized Data Publisher: structured enrichment added to a CVE record.
NVD
National Vulnerability Database: NIST's enrichment service for CVE records.
CERT / CSIRT
A computer security incident response team that publishes warnings or coordinates incident response.
PoC
Proof of concept: public material that demonstrates or helps reproduce exploitation.
CSAF
Common Security Advisory Framework: a machine-readable format for security advisories.
LoTL
Living off the land: abuse of legitimate tools or system functions during an attack.
Free version - for non-commercial use only.CVE-2026-30922 · cve.blacktree.nl