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.
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History
Tue, 19 Aug 2025 20:15:00 +0000
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Weaknesses | CWE-77 | |
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cvssV3_1
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Tue, 19 Aug 2025 14:00:00 +0000
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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. | |
References |
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Status: PUBLISHED
Assigner: mitre
Published: 2025-08-19T00:00:00.000Z
Updated: 2025-08-19T19:44:17.392Z
Reserved: 2025-06-16T00:00:00.000Z
Link: CVE-2025-50461

Updated: 2025-08-19T19:44:10.308Z

Status : Awaiting Analysis
Published: 2025-08-19T14:15:39.533
Modified: 2025-08-20T14:40:17.713
Link: CVE-2025-50461

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