CVE-2026-79990GQL entry mutation `siteId` bypasses schema site scope, enabling cross-site content read/write/delete
Updated under an hour ago ()
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It affects craftcms cms. Add what you run to find out whether that includes you.
No exploitation reported and no EPSS estimate yet.
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Craft CMS GraphQL entry mutation resolvers (saveEntry, deleteEntry) read siteIddirectly from$argumentswithout passing throughArgumentManagerprepareArguments(), which is the function that enforces site-scope filtering via array_intersect against the GraphQL schema’s allowed sites. The query path (ElementResolverprepareElementQuery) correctly calls prepareArguments()`, so queries to unauthorized sites return empty. But mutations bypass this entirely — an attacker with a token scoped to Site A can create, modify, or delete entries in Site B by passing siteId in the mutations argument.
- CVSS
- 8.7 HIGH (v4.0, CNA)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
- Weakness (CWE)
- CWE-639
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- Hackrate
- NVD analysis
- Deferred
- Record last updated
- Sep 2, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
craftcms cms craftcms:cms (from the name) | from 5.0.0-RC1 before 5.10.11 | CNA record |
References
- https://www.hckrt.com/hacktivity/HCKRT-XEQKMXthird-party-advisory, technical-description, mitigation
- https://github.com/craftcms/cms/releases/tag/5.10.11release-notes
- https://github.com/craftcms/cmsproduct
- https://github.com/craftcms/cms/security/advisories/GHSA-3wcr-p33w-528fthird-party-advisory
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.