CVE-2026-84796

Craft CMS 5.0.0-RC1 before 5.10.11 GraphQL Entry Mutation Site Scope Bypass

State: Published
Severity: 8.7 High
Published: Sep 2, 2026
Updated: Sep 2, 2026
Reserved: Sep 2, 2026

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.

Scores

CVSS	Score	Vector	Source
4.0	8.7 High	CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N	VulnCheck
3.1	8.8 High	CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H	VulnCheck

Weaknesses

CWE-639 Authorization Bypass Through User-Controlled Key

Affected Products

Product	Versions
cmscraftcms	5.0.0-RC1 to before 5.10.11Affected 5.10.11Not affected

References

GitHub Security Advisory (GHSA-3wcr-p33w-528f)vendor-advisory
VulnCheck Advisory: Craft CMS 5.0.0-RC1 before 5.10.11 GraphQL Entry Mutation Site Scope Bypassthird-party-advisory

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