pkgutil.get_data() does not enforce documented restrictions

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Summary

CVECVE-2026-3479
StatePUBLISHED
AssignerPSF
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-03-18 19:16:06 UTC
Updated2026-04-07 18:16:46 UTC
DescriptionDISPUTED: 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.

Risk And Classification

Primary CVSS: v4.0 0 NONE from [email protected]

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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

EPSS: 0.000070000 probability, percentile 0.005800000 (date 2026-04-07)

Problem Types: CWE-22 | CWE-22 CWE-22 Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')

VersionSourceTypeScoreSeverityVector
4.0[email protected]Secondary0NONECVSS:4.0/AV:P/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:N/SC:N/SI:N/SA:N/E:X/C...
4.0CNACVSS0NONECVSS:4.0/AV:P/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:N/SC:N/SI:N/SA:N

CVSS v4.0 Breakdown

Attack Vector
Physical
Attack Complexity
Low
Attack Requirements
None
Privileges Required
None
User Interaction
None
Confidentiality
None
Integrity
None
Availability
None
Sub Conf.
None
Sub Integrity
None
Sub Availability
None

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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Python Software Foundation CPython affected 3.14.4 python Not specified
CNA Python Software Foundation CPython affected 3.15.0a1 3.15.0a8 python Not specified

References

ReferenceSourceLinkTags
github.com/python/cpython/commit/d786d59a8f7196bb630100a869f28ad13436b59c [email protected] github.com
github.com/python/cpython/pull/146122 [email protected] github.com
github.com/python/cpython/issues/146121 [email protected] github.com
mail.python.org/archives/list/[email protected]/thread/WYLLVQOOCKG... [email protected] mail.python.org
github.com/python/cpython/commit/5af6ce3e7b643a30a02d22245c1e3f4a8bc0a1fe [email protected] github.com
github.com/python/cpython/commit/cf59bf76470f3d75ad47d80ffb8ce76b64b5e943 [email protected] github.com
github.com/python/cpython/commit/bcdf231946b1da8bdfbab4c05539bb0cc964a1c7 [email protected] github.com
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