CVE-2026-4538: PyTorch pt2 Loading deserialization

Severity: high (CVSS 7.8 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.2% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-03-22 · updated 2026-06-17
Weakness: CWE-20

Description

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.

Affected products

PyTorch: 2.10.0

References

https://github.com/pytorch/pytorch/
https://github.com/pytorch/pytorch/pull/176791
https://vuldb.com/?ctiid.352326
https://vuldb.com/?id.352326
https://vuldb.com/?submit.774681

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