Vulnerability details

CVE-2026-84202

modelscope modelscope

ModelScope through 1.40.0 Unsafe YAML Deserialization in Model Config Loading

CVSS 4.0

8.7High

Official 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.

CVSS scores

Score	Version	Source	Vector
8.7High	4.0	CVEProject cvelistV5 (CNA) (VulnCheck)	`CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N`
8.8High	3.1	CVEProject cvelistV5 (CNA) (VulnCheck)	`CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H`

Affected products

Vendor	Product	Versions	Source
modelscope	modelscope	v ≤ 1.40.0	CVEProject cvelistV5 (CNA)

References and advisories

https://github.com/modelscope/modelscope product
https://github.com/modelscope/modelscope/blob/v1.40.0/modelscope/models/audio/tts/voice.py technical-description
https://github.com/modelscope/modelscope/blob/v1.40.0/modelscope/models/multi_modal/mplug/configuration_mplug.py technical-description
https://www.vulncheck.com/advisories/modelscope-through-1.40.0-unsafe-yaml-deserialization-in-model-config-loading third-party-advisory
https://github.com/modelscope/modelscope/issues/1660 issue-tracking

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Details

Published: 2026-09-01
Last updated: 2026-09-01
State: Published
Assigner (CNA): VulnCheck

Exploit prediction (EPSS)

0.68%

Probability of exploitation in 30 days

52.6%

Percentile (among all CVEs)

SSVC assessment (CISA)

Automatable: No
Exploitation: Proof of concept
Technical impact: Total

Weaknesses (CWE)

CWE-502
Deserialization of Untrusted Data