CVE-2026-84796 Details
Description
Craft CMS versions before 5.10.11 contain a site scope bypass vulnerability in GraphQL entry mutation resolvers that fail to validate siteId through ArgumentManager::prepareArguments(). Attackers with tokens scoped to one site can read, modify, or delete entries across unauthorized sites by passing siteId directly in mutation arguments.
A site scope bypass vulnerability has been identified in Craft CMS versions 5.0.0-RC1 prior to 5.10.11. This vulnerability exists in the GraphQL entry mutation resolvers, specifically in the 'saveEntry' and 'deleteEntry' mutations. The issue arises because these resolvers do not properly validate the 'siteId' argument through the 'ArgumentManager::prepareArguments()' method, which is responsible for enforcing site-specific restrictions based on the GraphQL schema. As a result, attackers with tokens limited to one site can manipulate entries across unauthorized sites by directly including 'siteId' in the mutation arguments. This exploitation allows for reading, modifying, or deleting entries on other sites without proper authorization.
Users can upgrade to Craft CMS version 5.10.11 or later to address this vulnerability.
Metrics
CVSS 4.0 Severity and Vector Strings:
VolerionCVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
Volerion
Assessed Sep 2, 2026CISA-ADP
Assessed Sep 2, 2026References to Advisories, Solutions, and Tools
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Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-639 | Authorization Bypass Through User-Controlled Key | [email protected] |
Affected Products
| Product | Versions |
|---|---|
| Craft CMS | >= 5.0.0-RC1, < 5.10.11 (semver) |
CPE
Remediation
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Change History
2 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Sep 2, 2026 | CVE Modified | CISA-ADP |
| Sep 2, 2026 | New CVE Received | [email protected] |