CVE-2026-114583
Published Oct 22, 2026
Modified Oct 23, 2026
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.
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References
Other References
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/issues/160097
https://github.com/python/cpython/pull/160098
https://mail.python.org/archives/list/[email protected]/thread/43JOWPRAV5DI3VZ4FUEUAZOHCATXXOCK/
Frequently Asked Questions
What is CVE-2026-114583? +
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.
How do I check if I'm vulnerable to CVE-2026-114583? +
You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.