HighVulnerability

CVE-2026-31249: CosyVoice insecure deserialization in make_parquet_list.py via torch.load

Source: NVD(opens in a new tab)
Identifier: CVE-2026-31249
Published: May 11, 2026
Record updated: October 9, 2026

Known exploitation: Not listed in the CISA Known Exploited Vulnerabilities catalog at the last check.
EPSS: 0.2%

Summary

CosyVoice, up to commit 6e01309e01bc93bbeb83bdd996b1182a81aaf11e (2025-30-21), has an insecure deserialization flaw (CWE-502) in its make_parquet_list.py data processing tool. The script calls torch.load() on PyTorch .pt files without weights_only=True, so arbitrary Python objects are deserialized through the pickle module. An attacker who supplies malicious .pt files in a data directory gains code execution when a victim processes that directory with the tool.

Mitigation

The source does not state a fix yet. Check the original advisory for updates.

Details

Scores and exploitation

EPSS: 0.2%Estimated probability that this CVE is exploited in the next 30 days, from the FIRST Exploit Prediction Scoring System. Read on November 6, 2026.
Disclosure date: May 11, 2026

Weaknesses and techniques

AI threat technique (MITRE ATLAS): AML.T0010

Classification

Attack type: Supply chain
Attack sophistication: Trivial
AI component targeted: Training data
Impact: Integrity,
Availability
Labels: security

How this record was produced

Summaries, mitigations and labels on this page are generated automatically from the source. The linked source is authoritative. The source gives this advisory a description and no title, so the title above is a headline generated from the source text.

Original source: https://nvd.nist.gov/vuln/detail/CVE-2026-31249

First tracked: May 11, 2026 at 02:10 PM ET, from NVD/CVE Database

Classifier: claude-haiku-5-5, prompt v4

Classifier confidence: 85% (self-assessed)

Summary

Mitigation

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