Deserialization Vulnerability in PyTorch 2.10.0
CVE-2026-4538

4.8MEDIUM

Key Information:

Vendor

PyTorch

Status
Pytorch
Vendor
CVE Published:
22 March 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-4538?

A vulnerability exists in PyTorch 2.10.0 within an unknown function of the pt2 Loading Handler, which can lead to deserialization issues. This flaw is exploitable from a local environment, allowing potential attackers to manipulate the deserialization process. Although the issue was highlighted early via a pull request to the project maintainers, no action has been taken yet to address the vulnerability. As the exploit is publicly available, vigilance is advised for users operating affected versions.

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Affected Version(s)

PyTorch 2.10.0

Exploit Proof of Concept (PoC)

PoC code is written by security researchers to demonstrate the vulnerability can be exploited. PoC code is also a key component for weaponization which could lead to ransomware.

CVE-2026-4538 - Proof of Concept

References

https://vuldb.com/?id.352326
vdb-entry
https://vuldb.com/?ctiid.352326
signaturepermissions-required
https://vuldb.com/?submit.774681
third-party-advisory

CVSS V4

Score:
4.8
Severity:
MEDIUM
Confidentiality:
Low
Integrity:
Low
Availability:
Low
Attack Vector:
Local
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • 🟡

    Public PoC available

  • 👾

    Exploit known to exist

  • Vulnerability published

  • Vulnerability Reserved

Credit

ez-lbz (VulDB User)
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