CVE-2026-35592 pyLoad has an Incomplete Tar Path Traversal Fix in UnTar._safe_extractall via os.path.commonprefix Bypass
Attackers can write files outside the extraction directory in pyLoad due to an incomplete path traversal fix in the tar extractor.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- Available
What is CVE-2026-35592?
CVE-2026-35592 is a medium-severity path traversal vulnerability in pyload, published on 7 Apr 2026. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
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.
Weakness: CWE-22
Which versions are affected by CVE-2026-35592?
3 open source packages ship an affected version, including pyload-ng. It affects 1 product.
| Package | Affected | Fixed in |
|---|---|---|
pyload-ng PyPI | All versions | 0.5.0b3.dev97 |
pyload-ng PyPI | All versions | 0.5.0b3.dev97 |
pyload-ng PyPI | All versions | 0.5.0b3.dev97 |
Products include Pyload-Ng Project Pyload-Ng.
How do I fix CVE-2026-35592?
Upgrade pyload-ng to 0.5.0b3.dev97 or later.
Upgrade, and resolve every user-supplied path against an allowed base folder before opening it. More about Path traversal.
Is CVE-2026-35592 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-35592 exists.
Other vulnerabilities in pyload
- CVE-2025-54802 pyLoad CNL Blueprint is vulnerable to Path Traversal through `dlc_path` leading to Remote Code Execution (RCE)
- CVE-2024-22416 Cross-Site Request Forgery on any API call in pyLoad may lead to admin privilege escalation
- CVE-2023-0488 Cross-site Scripting (XSS) - Stored in pyload/pyload
- CVE-2026-35459 pyLoad has SSRF fix bypass via HTTP redirect
- CVE-2026-35463 pyLoad has Improper Neutralization of Special Elements used in an OS Command
Sources
Also known as GHSA-mvwx-582f-56r7, PYSEC-2026-124.