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CVE-2026-31251 Detail

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.


Metrics

NVD enrichment efforts reference publicly available information to associate vector strings. CVSS information contributed by other sources is also displayed.
CVSS 4.0 Severity and Vector Strings:

NIST CVSS score
NIST: NVD
N/A
NVD assessment not yet provided.

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URL Source(s) Tag(s)
MITRE
MITRE

Weakness Enumeration

CWE-ID CWE Name Source
CWE-20 Improper Input Validation CISA-ADP  
CWE-94 Improper Control of Generation of Code ('Code Injection') CISA-ADP  
CWE-915 Improperly Controlled Modification of Dynamically-Determined Object Attributes CISA-ADP  

Change History

2 change records found show changes

Quick Info

CVE Dictionary Entry:
CVE-2026-31251
NVD Published Date:
05/11/2026
NVD Last Modified:
05/12/2026
Source:
MITRE