What’s Vulnerable › Vulnerabilities

CVE-2026-3479: pkgutil.get_data() does not enforce documented restrictions

• Severity: none (CVSS 0.0 v4.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.2% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-03-18 · updated 2026-06-17
• Weakness: CWE-22

Description

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.

Affected products

• Python: before 3.13.13; from 3.14.0 before 3.14.4; from 3.15.0a1 before 3.15.0a8 — fixed in 3.13.13, 3.14.4, 3.15.0a8

How to fix

Upgrade to a fixed version: Python 3.13.13, 3.14.4, 3.15.0a8. Check the vendor advisory for mitigations.

References

• https://github.com/python/cpython/commit/5af6ce3e7b643a30a02d22245c1e3f4a8bc0a1fe
• https://github.com/python/cpython/commit/bcdf231946b1da8bdfbab4c05539bb0cc964a1c7
• https://github.com/python/cpython/commit/cf59bf76470f3d75ad47d80ffb8ce76b64b5e943
• https://github.com/python/cpython/commit/d786d59a8f7196bb630100a869f28ad13436b59c
• https://github.com/python/cpython/issues/146121
• https://github.com/python/cpython/pull/146122
• https://mail.python.org/archives/list/security-announce@python.org/thread/WYLLVQOOCKGK73JM7Z7ZSNOJC4N7BAWY/

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