| Name | CVE-2026-82049 |
| Description | In CPython 3.13 and earlier, the tarfile module's data and tar extraction filters are vulnerable to crafted archives containing a hard link to a symbolic link. Such archives may cause extraction to modify the permissions or modification time of a file outside the destination directory, or expose the contents of that file within the extracted tree. |
| Source | CVE (at NVD; CERT, ENISA, LWN, oss-sec, fulldisc, Debian ELTS, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more) |
Vulnerable and fixed packages
The table below lists information on source packages.
| Source Package | Release | Version | Status |
|---|
| pypy3 (PTS) | bookworm | 7.3.11+dfsg-2+deb12u3 | fixed |
| trixie | 7.3.19+dfsg-2 | vulnerable |
| forky, sid | 8.0.0+dfsg-1 | vulnerable |
| python3.11 (PTS) | bookworm | 3.11.2-6+deb12u8 | fixed |
| bookworm (security) | 3.11.2-6+deb12u3 | fixed |
| python3.13 (PTS) | trixie | 3.13.5-2+deb13u5 | vulnerable |
| forky, sid | 3.13.15-1 | vulnerable |
The information below is based on the following data on fixed versions.
| Package | Type | Release | Fixed Version | Urgency | Origin | Debian Bugs |
|---|
| pypy3 | source | bookworm | (not affected) | | | |
| pypy3 | source | (unstable) | (unfixed) | | | |
| python3.11 | source | (unstable) | (not affected) | | | |
| python3.13 | source | (unstable) | (unfixed) | | | |
Notes
[trixie] - python3.13 <no-dsa> (Minor issue)
- python3.11 <not-affected> (extraction filters (PEP 706) absent in 3.11.2)
[trixie] - pypy3 <no-dsa> (Minor issue)
[bookworm] - pypy3 <not-affected> (extraction filters (PEP 706) absent in stdlib 3.9.16)
https://github.com/python/cpython/issues/157190
https://github.com/python/cpython/pull/157191
https://github.com/python/cpython/pull/157262 (3.15)
https://github.com/python/cpython/pull/157261 (3.14)
https://github.com/python/cpython/pull/157192 (3.13)
https://github.com/python/cpython/commit/b8f23e307097552eaea2604383a12ab280520d0d (3.13 branch)
https://github.com/python/cpython/pull/157454 (3.12)
Fixed by changes in Python 3.14, some followup changes for 3.15/3.16, but without security impact
Same code situation as with CVE-2025-4435.