{"id":"CVE-2026-84202","title":"ModelScope uses PyYAML's unsafe yaml.Loader to parse model configuration files, allowing arbitrary code execution through Python object construction tags","summary":"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…","severity":"high","cvss":8.8,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H","cwe":["CWE-502","CWE-94"],"published":"2026-09-01","updated":"2026-09-08","sourceUpdated":"2026-09-08T20:18:59.270","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-84202","references":[{"url":"https://github.com/modelscope/modelscope","label":"disclosure@vulncheck.com"},{"url":"https://github.com/modelscope/modelscope/blob/v1.40.0/modelscope/models/audio/tts/voice.py","label":"disclosure@vulncheck.com"},{"url":"https://github.com/modelscope/modelscope/blob/v1.40.0/modelscope/models/multi_modal/mplug/configuration_mplug.py","label":"disclosure@vulncheck.com"},{"url":"https://github.com/modelscope/modelscope/issues/1660","label":"disclosure@vulncheck.com"},{"url":"https://www.vulncheck.com/advisories/modelscope-through-1.40.0-unsafe-yaml-deserialization-in-model-config-loading","label":"disclosure@vulncheck.com"},{"url":"https://github.com/modelscope/modelscope/issues/1660","label":"134c704f-9b21-4f2e-91b3-4a467353bcc0"},{"url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-84202.json"},{"url":"https://access.redhat.com/security/cve/CVE-2026-84202"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2526873"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-84202"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-84202"},{"url":"https://access.redhat.com/errata/RHSA-2026:84734"}],"tags":["nvd","csaf","vex","red-hat"],"epss":0.00682,"epssPercentile":0.52285,"ingestedAt":"2026-09-08T21:11:12.289Z","vendor":"Red Hat","product":"Red Hat OpenShift AI 3.4","affected":["openshift_ai 3.4"],"patched":["openshift_ai 3.4"],"slug":"CVE-2026-84202","body":"## Overview\n\nModelScope 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.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.\n\n## Vendor advisories\n\n- **Red Hat VEX** · Important · updated 2026-09-29 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-84202.json)\n- **RHSA-2026:84734** · Red Hat · fixed in: Red Hat OpenShift AI 3.4 · released 2026-10-19 · [advisory](https://access.redhat.com/errata/RHSA-2026:84734)","depth":"twilight","depthScore":49,"depthScoreParts":{"impact":48.4,"likelihood":0.1,"exploitation":0,"ransomware":0},"changes":[]}