CVE-2026-112776
9.8CriticalPublished 19 Oct 2026 · NVD status: Deferred · AI triage by gemini-3.8-flash
- Attack vector
- Network
- Complexity
- Low
- Privileges needed
- None
- User interaction
- None
- Impact
- Full C/I/A compromise
- Weakness
- CWE-863
Impact
Attackers with a site-scoped GraphQL token can create, modify, or delete entries, categories, tags, and assets across other sites in multi-site setups. They only need a valid GraphQL token scoped to a single site and network access to the GraphQL endpoint.
Root cause
The GraphQL mutation handlers fail to call requireAllowedSite() to enforce site-level authorization checks against the requested siteId.
Affected systems
Craft CMS 5.0.0 before 5.11.0
CVSS v3.1 · CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Fix & remediation
Upgrade Craft CMS to version 5.11.0 or later. If patching immediately is not possible, disable GraphQL mutations or revoke site-scoped GraphQL tokens.
$ composer require craftcms/cms:^5.11.0 --update-with-dependenciesAI-suggested. Run it in staging first and check it against the vendor advisory. Why?
NVD description
Craft CMS from 5.0.0 before 5.11.0 contains an authorization bypass vulnerability that allows site-scoped GraphQL tokens to mutate other sites' content because requireAllowedSite() is not enforced. Attackers holding a site-A token can create entries in site B via supplied siteId and delete entries, categories, tags, and assets shared across sites.