Vulnerability Description
CosyVoice thru commit 6e01309e01bc93bbeb83bdd996b1182a81aaf11e (2025-30-21) contains an insecure deserialization vulnerability (CWE-502) in its model loading component. The framework uses torch.load() to load model weight files (e.g., llm.pt, flow.pt, hift.pt) without enabling the security-restrictive weights_only=True parameter. This allows the deserialization of arbitrary Python objects via the pickle module. An attacker can exploit this by providing a malicious model directory containing specially crafted model files. When a victim starts the CosyVoice Web UI pointing to this directory, arbitrary code is executed on the victim's system during the model loading process.
CVSS Score
MEDIUM
Related Weaknesses (CWE)
References
- https://github.com/FunAudioLLM/CosyVoice
- https://www.notion.so/CVE-2026-31252-35d1e139318881ef8acfcd877a432569
FAQ
What is CVE-2026-31252?
CVE-2026-31252 is a vulnerability with a CVSS score of 5.7 (MEDIUM). CosyVoice thru commit 6e01309e01bc93bbeb83bdd996b1182a81aaf11e (2025-30-21) contains an insecure deserialization vulnerability (CWE-502) in its model loading component. The framework uses torch.load()...
How severe is CVE-2026-31252?
CVE-2026-31252 has been rated MEDIUM with a CVSS base score of 5.7/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-31252?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.