Vulnerability · Published Oct 19, 2026 · Assigned by VulnCheck
CVE-2026-112776Craft CMS 5.0.0 before 5.11.0 GraphQL Site-Scope Bypass via Mutations
Critical 9.8
In plain English
A critical-severity incorrect authorization in cms from craftcms. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.4% (higher than 33% of all known vulnerabilities).
Severity (CVSS 3.1)9.8Critical
Exploit odds (30 days)0.4%top 67.1% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
Official 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.
Affected products (as reported)
Weakness: CWE-863 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
References
- GitHub Security Advisory (GHSA-7rr3-4jcm-x526) vendor-advisory
- VulnCheck Advisory: Craft CMS 5.0.0 before 5.11.0 GraphQL Site-Scope Bypass via Mutations third-party-advisory