CVE-2026-4538: PYSEC-2026-139 - A vulnerability was identified in PyTorch 2.10.0. The affected element is an unknown function of the…

CVE-2026-4538 · Severity: low · CVSS 3.1 · Published 2026-03-22

A vulnerability was identified in PyTorch 2.10.0. The affected element is an unknown function of the component pt2 Loading Handler. The manipulation leads to deserialization. The attack can only be performed from a local environment. The exploit is publicly available and might be used. The project was informed of the problem early through a pull request but has not reacted yet.

Technologies: torch (PyPI). Vendors: PyPI.

Quick answers

Is CVE-2026-4538 exploited in the wild?
No. Junglewise Threat Intelligence has no report of CVE-2026-4538 being exploited in the wild.
How severe is CVE-2026-4538?
Low severity, with a CVSS score of 3.1, published 22 March 2026.
Which products and versions are affected?
torch (PyPI) ECOSYSTEM:introduced=0,last_affected=2.10.0.
Is there a fix for CVE-2026-4538?
No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.
Am I affected by CVE-2026-4538?
Check whether you run torch (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.

Affected products

  • torch (PyPI) ECOSYSTEM:introduced=0,last_affected=2.10.0

Identifiers

  • CVE-2026-4538
  • PYSEC-2026-139

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