CVE-2026-31252

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Summary

CVECVE-2026-31252
StatePUBLISHED
Assignermitre
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-05-11 17:16:20 UTC
Updated2026-05-12 20:16:33 UTC
DescriptionCosyVoice thru commit 6e01309e01bc93bbeb83bdd996b1182a81aaf11e (2025-30-21) contains an insecure deserialization vulnerability (CWE-502) in its model loading component. The framework uses torch.load() to load model weight files (e.g., llm.pt, flow.pt, hift.pt) without enabling 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 malicious model directory containing specially crafted model files. When a victim starts the CosyVoice Web UI pointing to this directory, arbitrary code is executed on the victim's system during the model loading process.

Risk And Classification

Primary CVSS: v3.1 5.7 MEDIUM from ADP

CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:L

EPSS: 0.000190000 probability, percentile 0.054610000 (date 2026-05-12)

Problem Types: CWE-94 | CWE-915 | n/a | CWE-94 CWE-94 Improper Control of Generation of Code ('Code Injection') | CWE-915 CWE-915 Improperly Controlled Modification of Dynamically-Determined Object Attributes

VersionSourceTypeScoreSeverityVector
3.1ADPDECLARED5.7MEDIUMCVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:L
3.1134c704f-9b21-4f2e-91b3-4a467353bcc0Secondary5.7MEDIUMCVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:L

CVSS v3.1 Breakdown

Attack Vector
Local
Attack Complexity
Low
Privileges Required
Low
User Interaction
Required
Scope
Changed
Confidentiality
Low
Integrity
Low
Availability
Low

CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:L

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Na N/a affected n/a Not specified

References

ReferenceSourceLinkTags
github.com/FunAudioLLM/CosyVoice [email protected] github.com
www.notion.so/CVE-2026-31252-35d1e139318881ef8acfcd877a432569 [email protected] www.notion.so
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