CVE-2026-31232 Deserialization in n/a
Attackers can achieve remote code execution by tricking users into loading malicious model files due to insecure deserialization in CosyVoice.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2026-31232?
CVE-2026-31232 is a high-severity unsafe deserialization vulnerability in n/a, published on 12 May 2026. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
Official description
The CosyVoice project thru commit 6e01309e01bc93bbeb83bdd996b1182a81aaf11e (2025-30-21) contains an insecure deserialization vulnerability (CWE-502) in its model loading process. When loading model files (.pt) from a user-specified directory (via the --model_dir argument), the code uses torch.load() without 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 maliciously crafted model directory containing .pt files with embedded pickle payloads. When a victim loads this directory using CosyVoice's web interface, the malicious payload is executed, leading to remote code execution on the victim's system.
Weakness: CWE-502
Which versions are affected by CVE-2026-31232?
How do I fix CVE-2026-31232?
No fix has been published for CVE-2026-31232 yet. Limit exposure of the affected software until one is available.
Upgrade, and only deserialise data from trusted sources or with an allow-list of types. More about Unsafe deserialization.
Is CVE-2026-31232 being exploited?
There is no known exploitation of CVE-2026-31232 in the wild and no public exploit code.
Sources
Also known as GHSA-chxf-r8w4-qgr9.