What is CVE-2026-84202?

CVE-2026-84202 is a high-severity vulnerability in Modelscope, classified under Deserialization of Untrusted Data. CVSS score: 8.8/10. Published 2026-09-01.

How severe is CVE-2026-84202?

High severity. CVSS v3 base score is 8.8 out of 10.

Deserialization in Modelscope

CVE-2026-84202

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.

Vulnerability class: Insecure Deserialization

CVSS v3 metric

CVSS v3 base score 8.8 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H.

Affected products

Modelscope

Weakness classification (CWE)

CWE-502 — Deserialization of Untrusted Data

References

disclosure@vulncheck.com (product)
disclosure@vulncheck.com (issue-tracking)
disclosure@vulncheck.com (technical-description)
disclosure@vulncheck.com (technical-description)
disclosure@vulncheck.com (third-party-advisory)

Frequently asked questions

What is CVE-2026-84202?: CVE-2026-84202 is a high-severity vulnerability in Modelscope, classified under Deserialization of Untrusted Data. CVSS score: 8.8/10. Published 2026-09-01.
How severe is CVE-2026-84202?: High severity. CVSS v3 base score is 8.8 out of 10.