Critical severity · published Oct 19, 2026
CVE-2026-112776
Craft CMS 5.0.0 before 5.11.0 GraphQL Site-Scope Bypass via Mutations
9.8
CVSS
0.4%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.4% · higher than 32% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
CM
cms · craftcms
5.0.0 before 5.11.0 · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-112776
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-112776
github.com
https://github.com/craftcms/cms/security/advisories/GHSA-7rr3-4jcm-x526
www.vulncheck.com
https://www.vulncheck.com/advisories/craft-cms-5.0.0-before-5.11.0-graphql-site-scope-bypass-via-mutations
More from cms
10.0
CVE-2025-32432
Craft CMS Allows Remote Code Execution
9.8
CVE-2024-56145
RCE when PHP `register_argc_argv` config setting is enabled in craftcms/cms
8.1
CVE-2025-23209
Potential RCE with a compromised security key in craft/cms
9.8
CVE-2026-84795
Craft CMS before 5.10.11 Authentication Bypass via Admin Flag Inheritance
9.8
CVE-2026-32267
Craft CMS Vulnerable to Privilege Escalation/Bypass through UsersController->actionImpersonateWithToken()