tarfile.data_filter path traversal bypass allows writing outside the extraction directory
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.
01
describes (1)
Related CVEs.
| ID | severity | exploitable | ||
|---|---|---|---|---|
| CVE-2026-7774US | — | — | ||
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 extr… | ||||
02
references
External citations — patches, advisories, analysis.
- http://www.openwall.com/lists/oss-security/2026/06/04/9WEB
- https://github.com/python/cpython/commit/0478bd83d82b255e0f29f613367a59d261e7eaa2WEB
- https://github.com/python/cpython/commit/0d28f5e46e151718972dfabd91205444d0037b6dWEB
- https://github.com/python/cpython/commit/10a13bee3c24f9c62b602e696334ff2272a40efcWEB
- https://github.com/python/cpython/commit/578411982c16f753f4893532510099ef665117daWEB
- https://github.com/python/cpython/commit/5cf47a248c35c375d610b87b2f72fd1ed454b558WEB
- https://github.com/python/cpython/commit/74cca9a92fb7d653e404843a56b8bdc7b0afdbbfWEB
- https://github.com/python/cpython/commit/c063191cb7f9170f9565e305f8aa2b79ab2bf609WEB
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