CVE-2026-31251
Severity CVSS v4.0:
Pending analysis
Type:
CWE-20
Input Validation
Publication date:
11/05/2026
Last modified:
12/05/2026
Description
CosyVoice thru commit 6e01309e01bc93bbeb83bdd996b1182a81aaf11e (2025-30-21) contains an insecure deserialization vulnerability (CWE-502) in its gRPC server component. When the server starts, it loads the speech synthesis model from a user-specified directory using torch.load() without enabling the weights_only=True security parameter. This allows the deserialization of arbitrary Python objects via the pickle module. An attacker can exploit this by providing malicious model files within a directory. When a victim starts the gRPC server pointing to this directory, arbitrary code is executed on the victim's system during server initialization.
Impact
Base Score 3.x
7.30
Severity 3.x
HIGH