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Full vulnerability report · 2026
CVE-2026-3479High confidence

pkgutil.get_data() does not enforce documented restrictions

Python Software Foundation · CPython

0.0NoneCVSS 4.0
Recommended action
Monitor

The structured sources do not provide enough evidence for a stronger action window. Track vendor updates and assess local exposure.

Patch available
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-2026-3479 · CSAF 2.0 · revision 3 · finalRed Hat Product Securitypython: Python pkgutil.get_data(): Path Traversal via improper resource argument validation
215 known affected

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

  • python-unversioned-command as a component of Red Hat Enterprise Linux 10
  • python3 as a component of Red Hat Enterprise Linux 10
  • python3-debug as a component of Red Hat Enterprise Linux 10
  • python3-devel as a component of Red Hat Enterprise Linux 10
  • python3-idle as a component of Red Hat Enterprise Linux 10
  • python3-libs as a component of Red Hat Enterprise Linux 10
  • python3-test as a component of Red Hat Enterprise Linux 10
  • python3-tkinter as a component of Red Hat Enterprise Linux 10
  • python3.12.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
Summary
A flaw was found in Python's `pkgutil.get_data()` function, which is used to retrieve data from packages. This function did not properly validate the `resource` argument, allowing a local attacker to perform path traversal attacks. Path traversal enables an attacker to access files and directories stored outside the intended root directory, potentially leading to information disclosure or unintended file access.
Remediation
For details on how to apply this update, which includes the changes described in this advisory, refer to: https://images.redhat.com/
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-2026-12940

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 actionMonitor

The structured sources do not provide enough evidence for a stronger action window. Track vendor updates and assess local exposure.

Patch available
01

What, why and how

DISPUTED: The project has clarified that the documentation was incorrect, and that pkgutil.get_data() has the same security model as open(). The documentation has been updated to clarify this point. There is no vulnerability in the function if following the intended security model. pkgutil.get_data() did not validate the resource argument as documented, allowing path traversals.

What

DISPUTED: The project has clarified that the documentation was incorrect, and that pkgutil.get_data() has the same security model as open(). The documentation has been updated to clarify this point. There is no vulnerability in the function if following the intended security model. pkgutil.get_data() did not validate the resource argument as documented, allowing path traversals.

Why

Attacker-controlled path data is not constrained to the intended directory before the application accesses a file.

How

An attacker operating through physical access may attempt exploitation without authentication or user interaction. If successful, the issue may cause the confidentiality, integrity or availability impact described by the vendor.

What

DISPUTED: The project has clarified that the documentation was incorrect, and that pkgutil.get_data() has the same security model as open(). The documentation has been updated to clarify this point. There is no vulnerability in the function if following the intended security model. pkgutil.get_data() did not validate the resource argument as documented, allowing path traversals.

Why

Attacker-controlled path data is not constrained to the intended directory before the application accesses a file.

How

An attacker operating through physical access may attempt exploitation without authentication or user interaction. 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
physical access → Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal') → cause the confidentiality, integrity or availability impact described by the vendor
Attack surface
Physical
Privileges required
None: unauthenticated exploitation is possible
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-22 ↗

CWE-22: Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal'). The product uses external input to construct a pathname that is intended to identify a file or directory that is located underneath a restricted parent directory, but the product does not properly neutralize special elements within the pathname that can cause the pathname to resolve to a location that is outside of the restricted directory.

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

Common Vulnerability Scoring System 4.0: the compact vector below is decoded into plain language.

AVPhysicalAttack vector: The attacker needs physical access to the vulnerable system.ACLowAttack complexity: No specialised conditions are required beyond attacker-controlled input.ATNoneAttack requirements: No additional deployment or execution condition is required.PRNonePrivileges required: The attacker does not need an account or existing privileges.UINoneUser interaction: No action by another user is required.VCNoneVulnerable-system confidentiality: No direct loss is represented by this metric.VINoneVulnerable-system integrity: No direct loss is represented by this metric.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.
UnauthenticatedCWE-22
A

Official authority intelligence

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

BSI · German · WID-SEC-W-2026-0791Python: Schwachstelle ermöglicht Path Traversal

Ein lokaler Angreifer kann eine Schwachstelle in Python ausnutzen, um einen Path-Traversal Angriff durchzuführen.

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

d?id=CVE-2026-34513 Référence CVE CVE-2026-34514 https://www.cve.org/CVERecord?id=CVE-2026-34514 Référence CVE CVE-2026-34515 https://www.cve.org/CVERecord?id=CVE-2026-34515 Référence CVE CVE-2026-34516 https://www.cve.org/CVERecord?id=CVE-2026-34516 Référence CVE CVE-2026-34517 https://www.cve.org/CVERecord?id=CVE-2026-34517 Référence CVE CVE-2026-34518 https://www.cve.org/CVERecord?id=CVE-2026-34518 Référence CVE CVE-2026-34519 https://www.cve.org/CVERecord?id=CVE-2026-34519 Référence CVE CVE-2026-34520 https://www.cve.org/CVERecord?id=CVE-2026-34520 Référence CVE CVE-2026-34525 https://www.cve.org/CVERecord?id=CVE-2026-34525 Référence CVE CVE-2026-3479 https://www.cve.org/CVERecord?id=CVE-2026-3479 Référence CVE CVE-2026-3497 https://www.cve.org/CVERecord?id=CVE-2026-3497 Référence CVE CVE-2026-34986 https://www.cve.org/CVERecord?id=CVE-2026-34986 Référence CVE CVE-2026-35236 https://www.cve.org/CVERecord?id=CVE-2026-35236 Référence CVE CVE-2026-35237 https://www.cve.org/CVERecord?id=CVE-2026-35237 Référence CVE CVE-2026-35238 https://www.cve.org/CVERecord?id=CVE-2026-35238 Référence CVE CVE-2026-35239 https://www.cve.org/CVERecord?id=CVE-2026-35239 Référence CVE CVE-2026-35240 https://www.cve.org/CVERecord?id=CVE-2026-35240 Référence CVE CVE-2026-35469 https://www.cve.org/CVERecord?id=CVE

Official advisory
CERT-FR · French · CERTFR-2026-AVI-0317Vulnérabilité dans Python

Une vulnérabilité a été découverte dans Python. Elle permet à un attaquant de provoquer 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
python-unversioned-command as a component of Red Hat Enterprise Linux 10; python3 as a component of Red Hat Enterprise Linux 10; python3-debug as a component of Red Hat Enterprise Linux 10; python3-devel as a component of Red Hat Enterprise Linux 10; python3-idle as a component of Red Hat Enterprise Linux 10; python3-libs as a component of Red Hat Enterprise Linux 10; python3-test as a component of Red Hat Enterprise Linux 10; python3-tkinter as a component of Red Hat Enterprise Linux 10; python3.12.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; and 185 more
Fixed
python3-11-main@aarch64 as a component of Red Hat Hardened Images; python3-11-main@src as a component of Red Hat Hardened Images; python3-11-main@x86_64 as a component of Red Hat Hardened Images; python3-12-main@aarch64 as a component of Red Hat Hardened Images; python3-12-main@src as a component of Red Hat Hardened Images; python3-12-main@x86_64 as a component of Red Hat Hardened Images; python3-13-main@aarch64 as a component of Red Hat Hardened Images; python3-13-main@src as a component of Red Hat Hardened Images; python3-13-main@x86_64 as a component of Red Hat Hardened Images; python3-14-main@aarch64 as a component of Red Hat Hardened Images; python3-14-main@noarch as a component of Red Hat Hardened Images; python3-14-main@src as a component of Red Hat Hardened Images; python3-14-main@x86_64 as a component of Red Hat Hardened Images
Action
For details on how to apply this update, which includes the changes described in this advisory, refer to: https://images.redhat.com/
Workaround
No verified workaround is recorded. Limit untrusted access and use least privilege until authoritative guidance is available.
04

Evidence and provenance

Published 18 Mar 2026 · Last source change 7 Apr 2026, 22:01 UTC · CWE-22 · Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')

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-2026-12940
Product sourceVendor CSAF · Red Hat Product Security
Remediation sourceVendor CSAF · Red Hat Product Security
CWE sourceCISA ADP
NVD statusNVD awaiting enrichment

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-2026-12940↗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-2026-3479 · cve.blacktree.nl