Log in Start free

Vulnerability · Published Apr 7, 2026 · Assigned by GitHub_M

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

Medium 5.3

In plain English

A medium-severity path traversal in pyload from pyload. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.3% (higher than 19% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.1)5.3Medium
Exploit odds (30 days)0.3%top 81.5% of all CVEs
Exploited in the wildNo reportsCISA SSVC: poc
Attack toolingNoneno public tooling known

Official description

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 packages & fixed versions

EcosystemPackageFixed inAdvisory
PyPIpyload-ng0.5.0b3.dev97GHSA-mvwx-582f-56r7
PyPIpyload-ng0.5.0b3.dev97PYSEC-2026-124

Affected products (as reported)

VendorProductVersions
pyload pyload < 0.5.0b3.dev97

Weakness: CWE-22 · Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:H/A:N

References