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BIT-LIBPYTHON-2025-4138 Bypassing extraction filter to create symlinks to arbitrary targets outside extraction directory

🗓️ 11 Aug 2025 13:53:07Reported by GoogleType 
osv
 osv🔗 osv.dev👁 6 Views

Tarfile filter bypass lets symlinks outside extraction; affects extractall/extract with data or tar.

Related
Refs
ReporterTitlePublishedViews
Family
GithubExploit		Exploit for CVE-2025-4517
15 Feb 202622:09
–githubexploit
GithubExploit		Exploit for CVE-2025-4138
15 Feb 202621:59
–githubexploit
GithubExploit		Exploit for CVE-2025-4138
16 Feb 202613:31
–githubexploit
GithubExploit		Exploit for CVE-2025-4138
16 Feb 202617:05
–githubexploit
GithubExploit		Exploit for CVE-2025-4138
15 Feb 202608:28
–githubexploit
GithubExploit		Exploit for CVE-2025-4517
18 Feb 202621:08
–githubexploit
IBM Security Bulletins		Security Bulletin: IBM Watson Speech Services Cartridge is vulnerable to a path traversal in Python [CVE-2025-4138]
17 Dec 202514:11
–ibm
IBM Security Bulletins		Security Bulletin: IBM Instana Observability is affected by multiple vulnerabilities within Instana Agent container image
7 Aug 202508:11
–ibm
IBM Security Bulletins		Security Bulletin: AIX/VIOS is affected by arbitrary code execution (CVE-2025-47273, CVE-2025-4330, CVE-2024-12718, CVE-2025-4138, CVE-2025-4517) due to Python
20 Aug 202515:03
–ibm
IBM Security Bulletins		Security Bulletin: Security vulnerabilities due to libxml2, python3, pam and glibc  packages shipped with IBM CICS TX Advanced.
12 Aug 202511:56
–ibm
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SourceLink
gistwww.gist.github.com/sethmlarson/52398e33eff261329a0180ac1d54f42f
githubwww.github.com/python/cpython/commit/19de092debb3d7e832e5672cc2f7b788d35951da
githubwww.github.com/python/cpython/commit/28463dba112af719df1e8b0391c46787ad756dd9
githubwww.github.com/python/cpython/commit/3612d8f51741b11f36f8fb0494d79086bac9390a
githubwww.github.com/python/cpython/commit/4633f3f497b1ff70e4a35b6fe2c907cbe2d4cb2e
githubwww.github.com/python/cpython/commit/9c1110ef6652687d7c55f590f909720eddde965a
githubwww.github.com/python/cpython/commit/9e0ac76d96cf80b49055f6d6b9a6763fb9215c2a
githubwww.github.com/python/cpython/commit/aa9eb5f757ceff461e6e996f12c89e5d9b583b01
githubwww.github.com/python/cpython/commit/dd8f187d0746da151e0025c51680979ac5b4cfb1
githubwww.github.com/python/cpython/issues/135034
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11 Aug 2025 15:13Current
8High risk
Vulners AI Score8
CVSS 3.17.5
EPSS0.01109
SSVC
tarfile extraction filtersymlinks outside extractionextractall extractuntrusted tar archivespython default data
6