Is CVE-2026-31251 actively exploited?

No active exploitation of CVE-2026-31251 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2026-31251 be exploited remotely?

Yes. CVE-2026-31251 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2026-31251?

CVE-2026-31251 has a CVSS score of 7.3 (HIGH).

HOME VULNERABILITIESCVE-2026-31251

HIGH

CVE-2026-31251

Published: May 11, 2026· Updated: May 12, 2026

7.3

CVSS v3.1

EPSS:0.02%probability of exploitation in 30 daysPercentile:5.5th

Official 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.

NVD Source

Technical Analysis

CVE-2026-31251 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.