BlackTreeIndependent security intelligence
← Back to the CVE catalogue
Full vulnerability report · 2026
CVE-2026-0672High confidence

Header injection in http.cookies.Morsel

Python Software Foundation · CPython

6.0MediumCVSS 4.0
Recommended action
Scheduled

Medium technical severity with no CISA KEV confirmation; remediate through the normal risk-based patch cycle unless local exposure raises the priority.

Patch available
Distribution package intelligence

Ubuntu vendor package status

Canonical’s release and source-package findings are shown separately from local repository availability.

1 package state
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.

Ubuntu releaseSource packageVendor stateFixed versionEvidence
Ubuntu 24.04 LTSnoble · standard archivepython3.12Vendor fix publishedCanonical reports that a fixed source package version has been published. Repository candidate availability is not checked by BlackTree.3.12.3-1ubuntu0.11Canonical record ↗Source updated 8 Sept 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-2026-0672 · CSAF 2.0 · revision 3 · finalRed Hat Product Securitycpython: Header injection in http.cookies.Morsel in Python
193 known affected

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

  • firefox as a component of Red Hat Enterprise Linux 10
  • firefox.src as a component of Red Hat Enterprise Linux 10
  • python3.14 as a component of Red Hat Enterprise Linux 10
  • python3.14-debug as a component of Red Hat Enterprise Linux 10
  • python3.14-devel as a component of Red Hat Enterprise Linux 10
  • python3.14-freethreading as a component of Red Hat Enterprise Linux 10
  • python3.14-freethreading-debug as a component of Red Hat Enterprise Linux 10
  • python3.14-freethreading-devel as a component of Red Hat Enterprise Linux 10
  • python3.14-freethreading-idle as a component of Red Hat Enterprise Linux 10
  • python3.14-freethreading-libs as a component of Red Hat Enterprise Linux 10
  • python3.14-freethreading-test as a component of Red Hat Enterprise Linux 10
  • python3.14-freethreading-tkinter as a component of Red Hat Enterprise Linux 10
Summary
An injection flaw has been discovered in Python. When using http.cookies.Morsel, user-controlled cookie values and parameters can allow injecting HTTP headers into messages. Patch rejects all control characters within cookie names, values, and parameters.
Remediation
For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258
Optional official sources

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

Select the national-authority views to include. The exact source language is shown on each matched advisory. Your choice is remembered on this device and encoded in the shareable URL.

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-2026-3521

No EUVD known-exploited evidence

ENISA has published the identifier mapping but no EUVD description has been stored yet.

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
Not supplied in the stored EUVD record
Advisory evidence
No linked advisory details stored yet
Recommended actionScheduled

Medium technical severity with no CISA KEV confirmation; remediate through the normal risk-based patch cycle unless local exposure raises the priority.

Patch available
01

What, why and how

When using http.cookies.Morsel, user-controlled cookie values and parameters can allow injecting HTTP headers into messages. Patch rejects all control characters within cookie names, values, and parameters.

What

When using http.cookies.Morsel, user-controlled cookie values and parameters can allow injecting HTTP headers into messages. Patch rejects all control characters within cookie names, values, and parameters.

Why

The product uses CRLF (carriage return line feeds) as a special element, e.g. to separate lines or records, but it does not neutralize or incorrectly neutralizes CRLF sequences from inputs.

How

An attacker operating through a network path may attempt exploitation with low privileges. If successful, the issue may cause the confidentiality, integrity or availability impact described by the vendor.

What

When using http.cookies.Morsel, user-controlled cookie values and parameters can allow injecting HTTP headers into messages. Patch rejects all control characters within cookie names, values, and parameters.

Why

The product uses CRLF (carriage return line feeds) as a special element, e.g. to separate lines or records, but it does not neutralize or incorrectly neutralizes CRLF sequences from inputs.

How

An attacker operating through a network path may attempt exploitation with low privileges. If successful, the issue may cause the confidentiality, integrity or availability impact described by the vendor.

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.
None recorded

No exploit-tagged reference or CISA SSVC proof-of-concept state is currently recorded. Research may still exist outside the structured feeds.

Likely attack path
a network path → Improper Neutralization of CRLF Sequences ('CRLF Injection') → cause the confidentiality, integrity or availability impact described by the vendor
Attack surface
Network
Privileges required
Low: a basic authenticated account is required
User interaction
None
Attack complexity
Low: no specialised conditions are recorded
Security boundary
Not a CVSS 4.0 base metric
Weakness
?CWE means Common Weakness Enumeration: a standard category for the underlying weakness.
CWE-93 ↗

CWE-93: Improper Neutralization of CRLF Sequences ('CRLF Injection'). The product uses CRLF (carriage return line feeds) as a special element, e.g. to separate lines or records, but it does not neutralize or incorrectly neutralizes CRLF sequences from inputs.

CVSS vector
?CVSS means Common Vulnerability Scoring System. The vector records the metric values used to calculate technical severity.
CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:L/VI:H/VA:N/SC:N/SI:N/SA:N

Common Vulnerability Scoring System 4.0: 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.ATPresentAttack requirements: A particular deployment or execution condition must be present.PRLowPrivileges required: The attacker needs basic user-level privileges.UINoneUser interaction: No action by another user is required.VCLowVulnerable-system confidentiality: A successful attack can cause a limited loss.VIHighVulnerable-system integrity: A successful attack can cause a major loss.VANoneVulnerable-system availability: No direct loss is represented by this metric.SCNoneSubsequent-system confidentiality: No direct loss is represented by this metric.SINoneSubsequent-system integrity: No direct loss is represented by this metric.SANoneSubsequent-system availability: No direct loss is represented by this metric.
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.
NetworkCWE-93
A

Official authority intelligence

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

BSI · German · WID-SEC-W-2026-2189Dell PowerProtect Data Domain: Mehrere Schwachstellen

Ein Angreifer kann mehrere Schwachstellen in Dell PowerProtect Data Domain ausnutzen, um seine Privilegien zu erhöhen um beliebigen Programmcode auszuführen, um Sicherheitsvorkehrungen zu umgehen, um einen Denial of Service Angriff durchzuführen, um einen Cross-Site Scripting Angriff durchzuführen, um Informationen offenzulegen, und um Dateien zu manipulieren.

Official advisory
BSI · German · WID-SEC-W-2026-0778Dell Secure Connect Gateway Policy Manager: Mehrere Schwachstellen

Ein Angreifer kann mehrere Schwachstellen in Dell Secure Connect Gateway Policy Manager ausnutzen, um einen nicht näher spezifizierten Angriff durchzuführen.

Official advisory
BSI · German · WID-SEC-W-2026-0209Cpython: Mehrere Schwachstellen

Ein entfernter, authentisierter Angreifer kann mehrere Schwachstellen in Cpython ausnutzen, um Dateien zu manipulieren oder beliebigen Code auszuführen.

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

.cve.org/CVERecord?id=CVE-2025-8291 Référence CVE CVE-2025-8713 https://www.cve.org/CVERecord?id=CVE-2025-8713 Référence CVE CVE-2025-8714 https://www.cve.org/CVERecord?id=CVE-2025-8714 Référence CVE CVE-2025-8715 https://www.cve.org/CVERecord?id=CVE-2025-8715 Référence CVE CVE-2025-8869 https://www.cve.org/CVERecord?id=CVE-2025-8869 Référence CVE CVE-2025-8916 https://www.cve.org/CVERecord?id=CVE-2025-8916 Référence CVE CVE-2025-9230 https://www.cve.org/CVERecord?id=CVE-2025-9230 Référence CVE CVE-2025-9231 https://www.cve.org/CVERecord?id=CVE-2025-9231 Référence CVE CVE-2025-9820 https://www.cve.org/CVERecord?id=CVE-2025-9820 Référence CVE CVE-2026-0672 https://www.cve.org/CVERecord?id=CVE-2026-0672 Référence CVE CVE-2026-0846 https://www.cve.org/CVERecord?id=CVE-2026-0846 Référence CVE CVE-2026-0861 https://www.cve.org/CVERecord?id=CVE-2026-0861 Référence CVE CVE-2026-0865 https://www.cve.org/CVERecord?id=CVE-2026-0865 Référence CVE CVE-2026-0897 https://www.cve.org/CVERecord?id=CVE-2026-0897 Référence CVE CVE-2026-0915 https://www.cve.org/CVERecord?id=CVE-2026-0915 Référence CVE CVE-2026-1225 https://www.cve.org/CVERecord?id=CVE-2026-1225 Référence CVE CVE-2026-1299 https://www.cve.org/CVERecord?id=CVE-2026-1299 Référence CVE CVE-2026-1462 https://www.cve.org/CVERecord?id=CVE-2026-1462 Ré

Official advisory
CERT-FR · French · CERTFR-2026-AVI-0315Multiples vulnérabilités dans les produits VMware

ERecord?id=CVE-2025-68121 Référence CVE CVE-2025-68160 https://www.cve.org/CVERecord?id=CVE-2025-68160 Référence CVE CVE-2025-69418 https://www.cve.org/CVERecord?id=CVE-2025-69418 Référence CVE CVE-2025-69419 https://www.cve.org/CVERecord?id=CVE-2025-69419 Référence CVE CVE-2025-69420 https://www.cve.org/CVERecord?id=CVE-2025-69420 Référence CVE CVE-2025-69421 https://www.cve.org/CVERecord?id=CVE-2025-69421 Référence CVE CVE-2025-8194 https://www.cve.org/CVERecord?id=CVE-2025-8194 Référence CVE CVE-2025-8291 https://www.cve.org/CVERecord?id=CVE-2025-8291 Référence CVE CVE-2025-8869 https://www.cve.org/CVERecord?id=CVE-2025-8869 Référence CVE CVE-2026-0672 https://www.cve.org/CVERecord?id=CVE-2026-0672 Référence CVE CVE-2026-0865 https://www.cve.org/CVERecord?id=CVE-2026-0865 Référence CVE CVE-2026-1225 https://www.cve.org/CVERecord?id=CVE-2026-1225 Référence CVE CVE-2026-1229 https://www.cve.org/CVERecord?id=CVE-2026-1229 Référence CVE CVE-2026-1299 https://www.cve.org/CVERecord?id=CVE-2026-1299 Référence CVE CVE-2026-1642 https://www.cve.org/CVERecord?id=CVE-2026-1642 Référence CVE CVE-2026-1703 https://www.cve.org/CVERecord?id=CVE-2026-1703 Référence CVE CVE-2026-1965 https://www.cve.org/CVERecord?id=CVE-2026-1965 Référence CVE CVE-2026-2003 https://www.cve.org/CVERecord?id=CVE-2026-2003 Ré

Official advisory
CERT-FR · French · CERTFR-2026-AVI-0218Multiples vulnérabilités dans les produits VMware

.cve.org/CVERecord?id=CVE-2025-8869 Référence CVE CVE-2025-8941 https://www.cve.org/CVERecord?id=CVE-2025-8941 Référence CVE CVE-2025-8959 https://www.cve.org/CVERecord?id=CVE-2025-8959 Référence CVE CVE-2025-9086 https://www.cve.org/CVERecord?id=CVE-2025-9086 Référence CVE CVE-2025-9165 https://www.cve.org/CVERecord?id=CVE-2025-9165 Référence CVE CVE-2025-9230 https://www.cve.org/CVERecord?id=CVE-2025-9230 Référence CVE CVE-2025-9231 https://www.cve.org/CVERecord?id=CVE-2025-9231 Référence CVE CVE-2025-9714 https://www.cve.org/CVERecord?id=CVE-2025-9714 Référence CVE CVE-2025-9900 https://www.cve.org/CVERecord?id=CVE-2025-9900 Référence CVE CVE-2026-0672 https://www.cve.org/CVERecord?id=CVE-2026-0672 Référence CVE CVE-2026-0861 https://www.cve.org/CVERecord?id=CVE-2026-0861 Référence CVE CVE-2026-0865 https://www.cve.org/CVERecord?id=CVE-2026-0865 Référence CVE CVE-2026-0900 https://www.cve.org/CVERecord?id=CVE-2026-0900 Référence CVE CVE-2026-0902 https://www.cve.org/CVERecord?id=CVE-2026-0902 Référence CVE CVE-2026-0915 https://www.cve.org/CVERecord?id=CVE-2026-0915 Référence CVE CVE-2026-0988 https://www.cve.org/CVERecord?id=CVE-2026-0988 Référence CVE CVE-2026-0989 https://www.cve.org/CVERecord?id=CVE-2026-0989 Référence CVE CVE-2026-0990 https://www.cve.org/CVERecord?id=CVE-2026-0990 Ré

Official advisory
CERT-FR · French · CERTFR-2026-AVI-0209Multiples vulnérabilités dans les produits VMware

e.org/CVERecord?id=CVE-2025-69420 Référence CVE CVE-2025-69421 https://www.cve.org/CVERecord?id=CVE-2025-69421 Référence CVE CVE-2025-7039 https://www.cve.org/CVERecord?id=CVE-2025-7039 Référence CVE CVE-2025-8277 https://www.cve.org/CVERecord?id=CVE-2025-8277 Référence CVE CVE-2025-8291 https://www.cve.org/CVERecord?id=CVE-2025-8291 Référence CVE CVE-2025-8556 https://www.cve.org/CVERecord?id=CVE-2025-8556 Référence CVE CVE-2025-8732 https://www.cve.org/CVERecord?id=CVE-2025-8732 Référence CVE CVE-2025-8869 https://www.cve.org/CVERecord?id=CVE-2025-8869 Référence CVE CVE-2025-9820 https://www.cve.org/CVERecord?id=CVE-2025-9820 Référence CVE CVE-2026-0672 https://www.cve.org/CVERecord?id=CVE-2026-0672 Référence CVE CVE-2026-0861 https://www.cve.org/CVERecord?id=CVE-2026-0861 Référence CVE CVE-2026-0865 https://www.cve.org/CVERecord?id=CVE-2026-0865 Référence CVE CVE-2026-0915 https://www.cve.org/CVERecord?id=CVE-2026-0915 Référence CVE CVE-2026-0964 https://www.cve.org/CVERecord?id=CVE-2026-0964 Référence CVE CVE-2026-0965 https://www.cve.org/CVERecord?id=CVE-2026-0965 Référence CVE CVE-2026-0966 https://www.cve.org/CVERecord?id=CVE-2026-0966 Référence CVE CVE-2026-0967 https://www.cve.org/CVERecord?id=CVE-2026-0967 Référence CVE CVE-2026-0968 https://www.cve.org/CVERecord?id=CVE-2026-0968 Ré

Official advisory
CERT-FR · French · CERTFR-2026-AVI-0199Multiples vulnérabilités dans les produits VMware

.cve.org/CVERecord?id=CVE-2025-8291 Référence CVE CVE-2025-8556 https://www.cve.org/CVERecord?id=CVE-2025-8556 Référence CVE CVE-2025-8732 https://www.cve.org/CVERecord?id=CVE-2025-8732 Référence CVE CVE-2025-8916 https://www.cve.org/CVERecord?id=CVE-2025-8916 Référence CVE CVE-2025-8941 https://www.cve.org/CVERecord?id=CVE-2025-8941 Référence CVE CVE-2025-9086 https://www.cve.org/CVERecord?id=CVE-2025-9086 Référence CVE CVE-2025-9230 https://www.cve.org/CVERecord?id=CVE-2025-9230 Référence CVE CVE-2025-9232 https://www.cve.org/CVERecord?id=CVE-2025-9232 Référence CVE CVE-2025-9714 https://www.cve.org/CVERecord?id=CVE-2025-9714 Référence CVE CVE-2026-0672 https://www.cve.org/CVERecord?id=CVE-2026-0672 Référence CVE CVE-2026-0861 https://www.cve.org/CVERecord?id=CVE-2026-0861 Référence CVE CVE-2026-0865 https://www.cve.org/CVERecord?id=CVE-2026-0865 Référence CVE CVE-2026-0915 https://www.cve.org/CVERecord?id=CVE-2026-0915 Référence CVE CVE-2026-0988 https://www.cve.org/CVERecord?id=CVE-2026-0988 Référence CVE CVE-2026-0989 https://www.cve.org/CVERecord?id=CVE-2026-0989 Référence CVE CVE-2026-0990 https://www.cve.org/CVERecord?id=CVE-2026-0990 Référence CVE CVE-2026-0992 https://www.cve.org/CVERecord?id=CVE-2026-0992 Référence CVE CVE-2026-1225 https://www.cve.org/CVERecord?id=CVE-2026-1225 Ré

Official advisory
CERT-FR · French · CERTFR-2026-AVI-0067Multiples vulnérabilités dans Python

De multiples vulnérabilités ont été découvertes dans CPython. Certaines d'entre elles permettent à un attaquant de provoquer une exécution de code arbitraire à distance, une atteinte à l'intégrité des données et un contournement de la politique de sécurité.

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
firefox as a component of Red Hat Enterprise Linux 10; firefox.src as a component of Red Hat Enterprise Linux 10; python3.14 as a component of Red Hat Enterprise Linux 10; python3.14-debug as a component of Red Hat Enterprise Linux 10; python3.14-devel as a component of Red Hat Enterprise Linux 10; python3.14-freethreading as a component of Red Hat Enterprise Linux 10; python3.14-freethreading-debug as a component of Red Hat Enterprise Linux 10; python3.14-freethreading-devel as a component of Red Hat Enterprise Linux 10; python3.14-freethreading-idle as a component of Red Hat Enterprise Linux 10; python3.14-freethreading-libs as a component of Red Hat Enterprise Linux 10; python3.14-freethreading-test as a component of Red Hat Enterprise Linux 10; python3.14-freethreading-tkinter as a component of Red Hat Enterprise Linux 10; python3.14-idle as a component of Red Hat Enterprise Linux 10; python3.14-libs as a component of Red Hat Enterprise Linux 10; python3.14-test as a component of Red Hat Enterprise Linux 10; python3.14-tkinter as a component of Red Hat Enterprise Linux 10; python3.14.src as a component of Red Hat Enterprise Linux 10; python as a component of Red Hat Enterprise Linux 6; python-devel as a component of Red Hat Enterprise Linux 6; python-libs as a component of Red Hat Enterprise Linux 6; python-test as a component of Red Hat Enterprise Linux 6; python-tools as a component of Red Hat Enterprise Linux 6; python.src as a component of Red Hat Enterprise Linux 6; tkinter as a component of Red Hat Enterprise Linux 6; firefox as a component of Red Hat Enterprise Linux 7; firefox.src as a component of Red Hat Enterprise Linux 7; python as a component of Red Hat Enterprise Linux 7; python-debug as a component of Red Hat Enterprise Linux 7; python-devel as a component of Red Hat Enterprise Linux 7; python-libs as a component of Red Hat Enterprise Linux 7; and 163 more
Fixed
python-unversioned-command-0:3.12.13-2.el10_2.noarch as a component of Red Hat Enterprise Linux AppStream (v. 10); python3-devel-0:3.12.13-2.el10_2.aarch64 as a component of Red Hat Enterprise Linux AppStream (v. 10); python3-devel-0:3.12.13-2.el10_2.ppc64le as a component of Red Hat Enterprise Linux AppStream (v. 10); python3-devel-0:3.12.13-2.el10_2.s390x as a component of Red Hat Enterprise Linux AppStream (v. 10); python3-devel-0:3.12.13-2.el10_2.x86_64 as a component of Red Hat Enterprise Linux AppStream (v. 10); python3-tkinter-0:3.12.13-2.el10_2.aarch64 as a component of Red Hat Enterprise Linux AppStream (v. 10); python3-tkinter-0:3.12.13-2.el10_2.ppc64le as a component of Red Hat Enterprise Linux AppStream (v. 10); python3-tkinter-0:3.12.13-2.el10_2.s390x as a component of Red Hat Enterprise Linux AppStream (v. 10); python3-tkinter-0:3.12.13-2.el10_2.x86_64 as a component of Red Hat Enterprise Linux AppStream (v. 10); python3.12-debuginfo-0:3.12.13-2.el10_2.aarch64 as a component of Red Hat Enterprise Linux AppStream (v. 10); python3.12-debuginfo-0:3.12.13-2.el10_2.ppc64le as a component of Red Hat Enterprise Linux AppStream (v. 10); python3.12-debuginfo-0:3.12.13-2.el10_2.s390x as a component of Red Hat Enterprise Linux AppStream (v. 10); python3.12-debuginfo-0:3.12.13-2.el10_2.x86_64 as a component of Red Hat Enterprise Linux AppStream (v. 10); python3.12-debugsource-0:3.12.13-2.el10_2.aarch64 as a component of Red Hat Enterprise Linux AppStream (v. 10); python3.12-debugsource-0:3.12.13-2.el10_2.ppc64le as a component of Red Hat Enterprise Linux AppStream (v. 10); python3.12-debugsource-0:3.12.13-2.el10_2.s390x as a component of Red Hat Enterprise Linux AppStream (v. 10); python3.12-debugsource-0:3.12.13-2.el10_2.x86_64 as a component of Red Hat Enterprise Linux AppStream (v. 10); python3.12-0:3.12.13-2.el8_10.aarch64 as a component of Red Hat Enterprise Linux AppStream (v. 8); python3.12-0:3.12.13-2.el8_10.ppc64le as a component of Red Hat Enterprise Linux AppStream (v. 8); python3.12-0:3.12.13-2.el8_10.s390x as a component of Red Hat Enterprise Linux AppStream (v. 8); python3.12-0:3.12.13-2.el8_10.src as a component of Red Hat Enterprise Linux AppStream (v. 8); python3.12-0:3.12.13-2.el8_10.x86_64 as a component of Red Hat Enterprise Linux AppStream (v. 8); python3.12-debuginfo-0:3.12.13-2.el8_10.aarch64 as a component of Red Hat Enterprise Linux AppStream (v. 8); python3.12-debuginfo-0:3.12.13-2.el8_10.i686 as a component of Red Hat Enterprise Linux AppStream (v. 8); python3.12-debuginfo-0:3.12.13-2.el8_10.ppc64le as a component of Red Hat Enterprise Linux AppStream (v. 8); python3.12-debuginfo-0:3.12.13-2.el8_10.s390x as a component of Red Hat Enterprise Linux AppStream (v. 8); python3.12-debuginfo-0:3.12.13-2.el8_10.x86_64 as a component of Red Hat Enterprise Linux AppStream (v. 8); python3.12-debugsource-0:3.12.13-2.el8_10.aarch64 as a component of Red Hat Enterprise Linux AppStream (v. 8); python3.12-debugsource-0:3.12.13-2.el8_10.i686 as a component of Red Hat Enterprise Linux AppStream (v. 8); python3.12-debugsource-0:3.12.13-2.el8_10.ppc64le as a component of Red Hat Enterprise Linux AppStream (v. 8); and 141 more
Action
For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258
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 20 Jan 2026 · Last source change 3 Mar 2026, 14:43 UTC · CWE-93 · Improper Neutralization of CRLF Sequences ('CRLF Injection')

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-2026-3521
Product sourceVendor CSAF · Red Hat Product Security
Remediation sourceVendor CSAF · Red Hat Product Security
CWE sourceCNA
NVD statusNVD not scheduled

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

Material change intelligence

What changed after publication

View recent updates →

No material field changes have been recorded since change tracking began. Routine source refreshes and cosmetic edits are intentionally excluded.

Material fields only · duplicate refreshes suppressed · history retained for the configured operational retention period
CVE published
ENISA EUVD · EUVD-2026-3521↗Vendor CSAF · Red Hat Product Security↗CVE authority or vendor 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-2026-0672 · cve.blacktree.nl