Bug 2525131 - CVE-2026-7774 python3.9: Python tarfile: Arbitrary file write via crafted link entries [fedora-all]
Summary: CVE-2026-7774 python3.9: Python tarfile: Arbitrary file write via crafted lin...
Keywords:
Status: NEW
Alias: None
Product: Fedora
Classification: Fedora
Component: python3.9
Version: rawhide
Hardware: Unspecified
OS: Unspecified
medium
medium
Target Milestone: ---
Assignee: Nobody's working on this, feel free to take it
QA Contact: Fedora Extras Quality Assurance
URL:
Whiteboard: {"flaws": ["7a19d553-e02b-4d1a-a8a1-6...
Depends On:
Blocks: CVE-2026-7774
TreeView+ depends on / blocked
 
Reported: 2026-08-27 17:06 UTC by Ganesh
Modified: 2026-09-23 12:15 UTC (History)
7 users (show)

Fixed In Version:
Clone Of:
Environment:
Last Closed:
Type: ---
Embargoed:


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Description Ganesh 2026-08-27 17:06:52 UTC
Disclaimer: Community trackers are created by Red Hat Product Security team on a best effort basis. Package maintainers are required to ascertain if the flaw indeed affects their package, before starting the update process.

tarfile.data_filter could be bypassed using crafted link entries, including symlinks with empty or directory-like names, to redirect later archive members outside the intended extraction directory. This allowed a malicious tar archive to cause tarfile.extractall() to write files outside the destination directory, subject to the permissions of the extracting process.

Comment 1 Miro Hrončok 2026-09-23 12:15:07 UTC
We are not actively working on this.


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