Auth bypass in Craftcms Cms
CVE-2026-112776
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.
Vulnerability class: Broken Access Control
Published · last modified .
CVSS v3 metric
CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.
EPSS exploit prediction
No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.
Affected products
Weakness classification (CWE)
References
- github.com/craftcms/cms/security/advisories/GHSA-7rr3-4jcm-x526 (vendor-advisory)
- www.vulncheck.com/advisories/craft-cms-5.0.0-before-5.11.0-graphql-site-scope-b… (third-party-advisory)
Frequently asked questions
- What is CVE-2026-112776?
- CVE-2026-112776 is a critical-severity vulnerability in Craftcms Cms, classified under Incorrect Authorization. CVSS score: 9.8/10. Published 2026-10-19.
- How severe is CVE-2026-112776?
- Critical severity. CVSS v3 base score is 9.8 out of 10.