CVE-2026-84202

ModelScope through 1.40.0 Unsafe YAML Deserialization in Model Config Loading

8.7 HighFix available

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.

Attack profile

How easy it is to exploit

Attack vector: Network
Complexity: Low
Privileges needed: None
User interaction: Passive

What an attacker can affect

Confidentiality: High
Integrity: High
Availability: High

Exploit likelihood

0.68%Up 0.3 points since Sep 2, 2026

What each source reports

CVE List Score used 8.7

ModelScope through 1.40.0 Unsafe YAML Deserialization in Model Config Loading

Record: CVE-2026-84202
CVSS 4.0: 8.7 HighCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
CVSS 3.1: 8.8 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Weakness: CWE-502
Updated: 2026-11-02

EUVDEUVD-2026-69289 8.7

Record: EUVD-2026-69289
CVSS 4.0: 8.7 HighCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
Updated: 2026-11-02

GitHub AdvisoriesGHSA-pq5m-26pg-cxxp 8.7

ModelScope uses PyYAML's unsafe yaml.Loader to parse model configuration files, allowing...

Record: GHSA-pq5m-26pg-cxxp
CVSS 4.0: 8.7 HighCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
CVSS 3.1: 8.8 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Weakness: CWE-502
Updated: 2026-11-02

NVD 8.7

Record: CVE-2026-84202
CVSS 4.0: 8.7 HighCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
CVSS 3.1: 8.8 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Weakness: CWE-502
Updated: 2026-11-02

OSV 8.7

ModelScope through 1.40.0 Unsafe YAML Deserialization in Model Config Loading

Record: CVE-2026-84202
CVSS 4.0: 8.7 HighCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
Weakness: CWE-502
Updated: 2026-11-02

OSVopenSUSE-SU-2026:11736-1 No score

python313-modelscope-1.40.0-1.1 on GA media

These are all security issues fixed in the python313-modelscope-1.40.0-1.1 package on the GA media of openSUSE Tumbleweed.

Record: openSUSE-SU-2026:11736-1
Updated: 2026-11-02

OSVopenSUSE-SU-2026:11746-1 No score

python313-modelscope-hub-0.4.2-1.1 on GA media

These are all security issues fixed in the python313-modelscope-hub-0.4.2-1.1 package on the GA media of openSUSE Tumbleweed.

Record: openSUSE-SU-2026:11746-1
Updated: 2026-11-02

Affected products

modelscope

Affected packages

Affected packages
Package	Affected	Fixed
`python-modelscope` openSUSE:Tumbleweed	before 1.40.0-1.1	1.40.0-1.1
`python-modelscope-hub` openSUSE:Tumbleweed	before 0.4.2-1.1	0.4.2-1.1

History

History
Recorded	Changed	Sources
Nov 2, 2026	first indexed	CVE List, EUVD, GitHub Advisories, NVD, OSV

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2026-84202 is a high vulnerability (CVSS 8.7) in Modelscope, published September 1, 2026. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.68%, the 52nd percentile. Fixed in python-modelscope 1.40.0-1.1.

References

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