CVE-2026-114583
tar filter allows writing outside destination via empty-named symlink
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Description
tarfile.tar_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() with filter="tar" to write files outside the destination directory, subject to the permissions of the extracting process. This is the tarfile.tar_filter counterpart of CVE-2026-7774, which covered tarfile.data_filter.
Remediation
No guide yetNo remediation guidance has been written for this CVE yet. What the record does show:
Patch and advisory references
- https://github.com/python/cpython/pull/160098
- https://github.com/python/cpython/commit/0901ad4ffb22605f12b705d1c1197f0a01f0ba0b
- https://github.com/python/cpython/commit/c6ada40177436e4e2533a7b252082b5f0c043477
- https://github.com/python/cpython/commit/e7e0b3523ad6ba8472873dda594cf4021a16f8b5
- https://github.com/python/cpython/commit/04d8fca7da2cf3ebc0881fec8a53a1330c3b665d
References (9)
CVSS
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