Missing Authorization in Craft CMS - #VU159598
Published: November 6, 2026
Vulnerability identifier: #VU159598
CSH Severity: Medium
CVSS v4: 6.9 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N]
CVE-ID: N/A
CWE-ID: CWE-862
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows an unauthenticated remote attacker to read content from sites excluded from a Craft CMS GraphQL Public Schema.
The vulnerability exists due to missing Sites-scope authorization for the GraphQL localized field when its siteId or site argument is omitted. An unauthenticated remote attacker can query /actions/graphql/api in a multi-site installation with an in-scope section shared across authorized and excluded sites to retrieve that section’s excluded-site content.
Affected software
Craft CMS
Remediation
Install security update from vendor's website.
Craft CMS - update to 5.11.2