Auth bypass in Craftcms Cms
CVE-2026-84796
Craft CMS versions before 5.10.11 contain a site scope bypass vulnerability in GraphQL entry mutation resolvers that fail to validate siteId through ArgumentManager::prepareArguments(). Attackers with tokens scoped to one site can read, modify, or delete entries across unauthorized sites by passing siteId directly in mutation arguments.
Vulnerability class: IDOR (Insecure Direct Object Reference)
CVSS v3 metric
CVSS v3 base score 8.8 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.
Affected products
Weakness classification (CWE)
References
- disclosure@vulncheck.com (vendor-advisory)
- disclosure@vulncheck.com (third-party-advisory)
Frequently asked questions
- What is CVE-2026-84796?
- CVE-2026-84796 is a high-severity vulnerability in Craftcms Cms, classified under Authorization Bypass Through User-Controlled Key. CVSS score: 8.8/10. Published 2026-09-02.
- How severe is CVE-2026-84796?
- High severity. CVSS v3 base score is 8.8 out of 10.