Bypass extraction filter to modify file metadata outside extraction directory

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2024-12718
StatePUBLISHED
AssignerPSF
Source PriorityCVE Program / NVD first with legacy fallback
Published2025-06-03 13:15:20 UTC
Updated2026-07-31 15:16:26 UTC
DescriptionAllows modifying some file metadata (e.g. last modified) with filter="data" or file permissions (chmod) with filter="tar" of files outside the extraction directory. You are affected by this vulnerability if using the tarfile module to extract untrusted tar archives using TarFile.extractall() or TarFile.extract() using the filter= parameter with a value of "data" or "tar". See the tarfile extraction filters documentation https://docs.python.org/3/library/tarfile.html#tarfile-extraction-filter  for more information. Only Python versions 3.12 or later are affected by these vulnerabilities, earlier versions don't include the extraction filter feature. Note that for Python 3.14 or later the default value of filter= changed from "no filtering" to `"data", so if you are relying on this new default behavior then your usage is also affected. Note that none of these vulnerabilities significantly affect the installation of source distributions which are tar archives as source distributions already allow arbitrary code execution during the build process. However when evaluating source distributions it's important to avoid installing source distributions with suspicious links.

Risk And Classification

Primary CVSS: v3.1 5.3 MEDIUM from [email protected]

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N

EPSS: 0.006630000 probability, percentile 0.481650000 (date 2026-08-03)

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

VersionSourceTypeScoreSeverityVector
3.1[email protected]Secondary5.3MEDIUMCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
3.1CNACVSS5.3MEDIUMCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N

CVSS v3.1 Breakdown

Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
Low
Availability
None

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Python Software Foundation CPython affected 3.9.23 python Not specified
CNA Python Software Foundation CPython affected 3.10.0 3.10.18 python Not specified
CNA Python Software Foundation CPython affected 3.11.0 3.11.13 python Not specified
CNA Python Software Foundation CPython affected 3.12.0 3.12.11 python Not specified
CNA Python Software Foundation CPython affected 3.13.0 3.13.4 python Not specified
CNA Python Software Foundation CPython affected 3.14.0a1 3.14.0b3 python Not specified

References

ReferenceSourceLinkTags
github.com/python/cpython/commit/4633f3f497b1ff70e4a35b6fe2c907cbe2d4cb2e [email protected] github.com
github.com/python/cpython/commit/3612d8f51741b11f36f8fb0494d79086bac9390a [email protected] github.com
github.com/python/cpython/commit/dd8f187d0746da151e0025c51680979ac5b4cfb1 [email protected] github.com
github.com/python/cpython/pull/135037 [email protected] github.com
github.com/python/cpython/commit/9c1110ef6652687d7c55f590f909720eddde965a [email protected] github.com
github.com/python/cpython/issues/135034 [email protected] github.com
github.com/python/cpython/commit/19de092debb3d7e832e5672cc2f7b788d35951da [email protected] github.com
github.com/python/cpython/commit/28463dba112af719df1e8b0391c46787ad756dd9 [email protected] github.com
gist.github.com/sethmlarson/52398e33eff261329a0180ac1d54f42f [email protected] gist.github.com
github.com/python/cpython/commit/aa9eb5f757ceff461e6e996f12c89e5d9b583b01 [email protected] github.com
github.com/python/cpython/commit/9e0ac76d96cf80b49055f6d6b9a6763fb9215c2a [email protected] github.com
mail.python.org/archives/list/[email protected]/thread/MAXIJJCUUMC... [email protected] mail.python.org
github.com/python/cpython/issues/127987 134c704f-9b21-4f2e-91b3-4a467353bcc0 github.com
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis

Vendor Comments And Credit

Discovery Credit

CNA: Jakub Wilk (en)

CNA: Seth Larson (en)

CNA: Petr Viktorin (en)

CNA: Serhiy Storchaka (en)

CNA: Hugo van Kemenade (en)

CNA: Łukasz Langa (en)

CNA: Thomas Wouters (en)

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