PT-2026-55185 · Git · Cpython

Published 2026-06-30 · Updated 2026-06-30

OSV

In the Tarfile.extract() function, the filter parameter is not passed properly when extracting hardlinks. An affected system that extracts content from untrusted tar files could end up writing files with an unexpected uid/gid despite the user passing filter='data' to the extract() function.

Related Identifiers

PSF-2026-32

Affected Products

Cpython

References · 8

• https://osv.dev/vulnerability/PSF-2026-32 · Vendor Advisory
• https://github.com/python/cpython/commit/5e0ef3f1afe892e4f64eb83368db57ac4c40cba0 · Note
• https://github.com/python/cpython/commit/eee3ddf0ca10283cc7fea724aae9cd8665f8d15e · Note
• https://github.com/python/cpython/pull/151988 · Note
• https://github.com/python/cpython/issues/151987 · Note
• https://github.com/python/cpython/commit/7ccdbaba2c54250a70d7f25632152df7655a5e0a · Note
• https://github.com/python/cpython/commit/7b57e8d51446297b8c7c482d224bc5f1938e4301 · Note
• https://mail.python.org/archives/list/[e-mail]/thread/TWZW2PC2AZOV6FENIHFSRC63OM7MBGSB · Note