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CVE-2025-50461

MEDIUM

6.5

Description

A deserialization vulnerability exists in Volcengine's verl 3.0.0, specifically in the scripts/model_merger.py script when using the "fsdp" backend. The script calls torch.load() with weights_only=False on user-supplied .pt files, allowing attackers to execute arbitrary code if a maliciously crafted model file is loaded. An attacker can exploit this by convincing a victim to download and place a malicious model file in a local directory with a specific filename pattern. This vulnerability may lead to arbitrary code execution with the privileges of the user running the script.

CVE Details

CVSS v3.1 Score6.5

SeverityMEDIUM

CVSS VectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N

Attack VectorNETWORK

ComplexityLOW

Privileges RequiredNONE

User InteractionNONE

Published8/19/2025

Last Modified8/20/2025

Sourcenvd

Honeypot Sightings0

Weaknesses (CWE)

CWE-77

References

https://github.com/Anchor0221/CVE-2025-50461(cve@mitre.org)

https://github.com/pytorch/pytorch/blob/main/SECURITY.md#loading-untrusted-data(cve@mitre.org)

https://github.com/volcengine/verl(cve@mitre.org)

https://github.com/volcengine/verl/blob/main/scripts/model_merger.py#L152(cve@mitre.org)

https://pytorch.org/docs/stable/generated/torch.load.html(cve@mitre.org)

IOC Correlations

No correlations recorded

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