What’s Vulnerable › Vulnerabilities

CVE-2026-84202: ModelScope through 1.40.0 Unsafe YAML Deserialization in Model Config Loading

• Severity: high (CVSS 8.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.7% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-09-01 · updated 2026-09-08
• Weakness: CWE-502

Description

ModelScope uses PyYAML's unsafe yaml.Loader to parse model configuration files, allowing arbitrary code execution through Python object construction tags. Attackers can craft malicious model repositories with poisoned configuration files that execute code when loaded by users.

Affected products

• modelscope: through 1.40.0

References

• https://github.com/modelscope/modelscope
• https://github.com/modelscope/modelscope/blob/v1.40.0/modelscope/models/audio/tts/voice.py
• https://github.com/modelscope/modelscope/blob/v1.40.0/modelscope/models/multi_modal/mplug/configuration_mplug.py
• https://github.com/modelscope/modelscope/issues/1660
• https://www.vulncheck.com/advisories/modelscope-through-1.40.0-unsafe-yaml-deserialization-in-model-config-loading
• https://github.com/modelscope/modelscope/issues/1660

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