There is a HIGH severity vulnerability affecting {project}.

There is a defect in the CPython “tarfile” module affecting the “TarFile” extraction and entry enumeration APIs. The tar implementation would process tar archives with negative offsets without error, resulting in an infinite loop and deadlock during the parsing of maliciously crafted tar archives.

This vulnerability can be mitigated by including the following patch after importing the “tarfile” module:

import tarfile

def _block_patched(self, count): if count < 0: # pragma: no cover raise tarfile.InvalidHeaderError("invalid offset") return _block_patched._orig_block(self, count)

_block_patched._orig_block = tarfile.TarInfo._block tarfile.TarInfo._block = _block_patched

Please see the linked CVE ID for the latest information on affected versions:

• https://www.cve.org/CVERecord?id=CVE-2025-8194
• https://github.com/python/cpython/pull/137027