CVE-2026-7774

Impact

tarfile.data_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() to write files outside the destination directory, subject to the permissions of the extracting process.

Affected packages

This record carries no package version data, so it cannot be matched against a dependency list automatically. Read the advisory and compare your version by hand.

Weakness classification

References

• NVD record
• CVE.org record
• https://github.com/python/cpython/commit/0478bd83d82b255e0f29f613367a59d261e7eaa2
• https://github.com/python/cpython/commit/0d28f5e46e151718972dfabd91205444d0037b6d
• https://github.com/python/cpython/commit/10a13bee3c24f9c62b602e696334ff2272a40efc
• https://github.com/python/cpython/commit/578411982c16f753f4893532510099ef665117da
• https://github.com/python/cpython/commit/5cf47a248c35c375d610b87b2f72fd1ed454b558
• https://github.com/python/cpython/commit/74cca9a92fb7d653e404843a56b8bdc7b0afdbbf
• https://github.com/python/cpython/commit/c063191cb7f9170f9565e305f8aa2b79ab2bf609
• https://github.com/python/cpython/issues/149486
• https://github.com/python/cpython/pull/149487
• https://mail.python.org/archives/list/security-announce@python.org/thread/4FU62L2M6RMMHT2QPGQNPEHHUND7CEX5/
• http://www.openwall.com/lists/oss-security/2026/06/04/9