Source: pypy3 X-Debbugs-CC: [email protected] Severity: important Tags: security
Hi, The following vulnerability was published for pypy3. CVE-2026-11940[0]: | tarfile.extractall() with the 'data' or 'tar' filter could be | bypassed by a crafted archive where a hardlink references a symlink | stored at a deeper name than the hardlink itself. The extraction | fallback validated the symlink at it's archived location but | recreated it at the hardlink's shallower path, letting a relative | target the filter judged contained escape the destination | directory. This allowed a malicious tar archive to create a | symlink pointing outside the destination, enabling out-of- | destination file reads or writes. This was an incomplete fix of | CVE-2025-4330. https://github.com/python/cpython/issues/151558 https://github.com/python/cpython/pull/151559 https://github.com/python/cpython/commit/672825e2f36a57e173959b0d9d409d4560dab8df (3.15 branch) If you fix the vulnerability please also make sure to include the CVE (Common Vulnerabilities & Exposures) id in your changelog entry. For further information see: [0] https://security-tracker.debian.org/tracker/CVE-2026-11940 https://www.cve.org/CVERecord?id=CVE-2026-11940 Please adjust the affected versions in the BTS as needed.
