Quick answers
- Is CVE-2026-35592 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2026-35592 being exploited in the wild.
- How severe is CVE-2026-35592?
- Medium severity, with a CVSS score of 5.3, published 8 April 2026.
- Which products and versions are affected?
- pyload-ng (PyPI) < 0.5.0b3.dev97, ECOSYSTEM:introduced=0,fixed=0.5.0b3.dev97.
- Is there a fix for CVE-2026-35592?
- Yes. pyload-ng (PyPI): upgrade to 0.5.0b3.dev97 or later. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
- How is CVE-2026-35592 attacked?
- It is attacked over the network, in a network appliance.
- Am I affected by CVE-2026-35592?
- Check whether you run pyload-ng (PyPI) at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.
How to fix
- pyload-ng (PyPI): upgrade to 0.5.0b3.dev97 or later
pip install "pyload-ng>=0.5.0b3.dev97"
Technical details
The `_safe_extractall` function in `src/pyload/plugins/extractors/UnTar.py` implements a path traversal check using `os.path.commonprefix()`. Because this function performs character-level string comparison rather than path-component comparison, it can be bypassed using sibling directory names that share a common string prefix (e.g., `/downloads/pkg` vs `/downloads/pkg_evil`). An attacker can craft a Tar archive with members containing `..` sequences that resolve to locations outside the extraction directory. Exploitation requires the 'ExtractArchive' addon to be enabled and the victim to download a malicious archive. The vulnerability is addressed in version 0.5.0b3.dev97 by using `os.path.commonpath()`.
Affected products
- pyload pyload-ng < 0.5.0b3.dev97
Identifiers
- CVE-2026-35592
- GHSA-mvwx-582f-56r7
- PYSEC-2026-124
Timeline
- 2026-04-07: advisory: NVD publication date
- 2026-04-08: disclosed: GitHub Advisory published