CVE-2026-82049

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.

CVSS 4.0

8.4CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N

EPSS

0.2% chance of exploitation in the next 30 days; higher than 8% of CVEs (scores of 2026-10-25)

CWE

CWE-59

Published

2026-09-14

Modified

2026-10-11

Record from

the NVD, synced 2026-10-19

References

• https://github.com/python/cpython/commit/197663d63afed27f66e10e23c194e8a634e60913
• https://github.com/python/cpython/commit/28f315486b3da0352b9a1de1c3c97f4127ba4771
• https://github.com/python/cpython/commit/5a57248b22ad3b9aafcaaadae2c304a1923daeca
• https://github.com/python/cpython/commit/b38be2e6cf9d989075ab73412c63e003ebad4ff3
• https://github.com/python/cpython/commit/b8f23e307097552eaea2604383a12ab280520d0d

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