Vulnerability 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.
CVSS Score
HIGH
Related Weaknesses (CWE)
References
- https://github.com/FunAudioLLM/CosyVoice
- https://www.notion.so/CVE-2026-31251-35d1e1393188816f9bf5f3ccea3aa16f
FAQ
What is CVE-2026-31251?
CVE-2026-31251 is a vulnerability with a CVSS score of 7.3 (HIGH). 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 ...
How severe is CVE-2026-31251?
CVE-2026-31251 has been rated HIGH with a CVSS base score of 7.3/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-31251?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.