CVE-2026-84796CWE-639

CVE-2026-84796

High · published September 2, 2026

CVSS v3.1
8.8
EPSS
0%
Percentile
39.6
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
8.8 · HIGH
Vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CVSS v4.0
8.7 · 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
EPSS
0.00469 · 39.6th percentile
Weakness
CWE-639 · Authorization Bypass Through User-Controlled Key
Published
2026-09-02T16:17Z
References (2)
https://github.com/craftcms/cms/security/advisories/GHSA-3wcr-p33w-528f · [email protected]https://www.vulncheck.com/advisories/craft-cms-5.0.0-rc1-before-5.10.11-graphql-entry-mutation-site-scope-bypass · [email protected]
EPSS history
Timeline
  • 04 SEP 03:44Z
    EPSS moved — → 0%
    epss
  • 02 SEP 11:11Z
    Craft CMS 5.0.0-RC1 before 5.10.11 GraphQL Entry Mutation Site Scope Bypass
    cvelistv5