CVE-2026-35592 — pyLoad has an Incomplete Tar Path Traversal Fix in UnTar._safe_extractall via os.path.commonprefix Bypass

Description (CNA)

pyLoad is a free and open-source download manager written in Python. Prior to 0.5.0b3.dev97, the _safe_extractall() function in src/pyload/plugins/extractors/UnTar.py uses os.path.commonprefix() for its path traversal check, which performs character-level string comparison rather than path-level comparison. This allows a specially crafted tar archive to write files outside the intended extraction directory. The correct function os.path.commonpath() was added to the codebase in the CVE-2026-32808 fix (commit 5f4f0fa) but was never applied to _safe_extractall(), making this an incomplete fix. This vulnerability is fixed in 0.5.0b3.dev97.

Affected (CNA)

Vendor / product	Versions
pyload / pyload	affected < 0.5.0b3.dev97

CWE

CWE-22

References

https://github.com/pyload/pyload/security/advisories/GHSA-mvwx-582f-56r7

ADP enrichment

CISA-ADP

No English description supplied.

No references supplied.