CVE-2026-4538: PyTorch pt2 Loading deserialization

Published Mar 22, 2026
·
Updated

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 Software

3 affected components
PyTorch PyTorch=2.10.0
linuxfoundation Pytorch Python=2.10.0
IBM watsonx.data intelligence<=5.2.2, 5.3.0, 5.3.1, 5.3.1-patch-1

Event History

Mar 22, 2026
CVE Published
via MITRE·04:20 AM
Data Sourced
via MITRE·04:20 AM
DescriptionSeverityWeakness
Data Sourced
via NVD·05:16 AM
RemedyDescriptionSeverityWeaknessAffected Software
Jun 24, 2026
Data Sourced
via IBM·12:00 AM
DescriptionAffected Software

Parent advisories

This vulnerability appears in the following advisories.

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Frequently Asked Questions

1

What is the severity of CVE-2026-4538?

CVE-2026-4538 is classified as a high severity vulnerability due to its potential to lead to deserialization attacks.

2

How do I fix CVE-2026-4538?

To fix CVE-2026-4538, it is recommended to upgrade PyTorch to a newer version that addresses this vulnerability.

3

What components are affected by CVE-2026-4538?

CVE-2026-4538 affects the pt2 Loading Handler component of PyTorch version 2.10.0.

4

Can CVE-2026-4538 be exploited remotely?

No, CVE-2026-4538 can only be exploited from a local environment.

5

What type of vulnerability is CVE-2026-4538?

CVE-2026-4538 is a deserialization vulnerability that can be manipulated by an attacker.

Contact

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