Quick answers
- Is CVE-2026-31250 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2026-31250 being exploited in the wild.
- How severe is CVE-2026-31250?
- High severity, with a CVSS score of 7.3, published 11 May 2026.
- Which products and versions are affected?
- FunAudioLLM CosyVoice thru commit 6e01309e01bc93bbeb83bdd996b1182a81aaf11e.
- Is there a fix for CVE-2026-31250?
- No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.
- How is CVE-2026-31250 attacked?
- It is attacked with local access, in a software library.
- Am I affected by CVE-2026-31250?
- Check whether you run FunAudioLLM CosyVoice at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.
Technical details
An insecure deserialization vulnerability (CWE-502) exists in the `average_model.py` script of CosyVoice. The root cause is the use of `torch.load()` to process PyTorch checkpoint files (`epoch_*.pt`) without the `weights_only=True` parameter enabled. Because `torch.load()` utilizes the Python `pickle` module by default, it is susceptible to the deserialization of arbitrary Python objects. An attacker can exploit this by crafting a malicious checkpoint file; when a victim attempts to use the model averaging tool on a directory containing this file, the malicious payload is executed. This requires the victim to manually run the tool on the attacker-supplied file.
Affected products
- FunAudioLLM CosyVoice thru commit 6e01309e01bc93bbeb83bdd996b1182a81aaf11e
Timeline
- 2026-05-11: advisory: CVE-2026-31250 published by NVD/MITRE