Cross-site content compromise via unchecked mutation siteId
Published Sep 2, 2026 · Updated Sep 2, 2026
Authorization bypass in Pixel & Tonic Craft CMS before 5.10.11 allows remote authenticated users to access content across site scopes. The saveEntry and deleteEntry resolvers read siteId directly from mutation arguments instead of passing it through ArgumentManager::prepareArguments, which filters requested sites against the GraphQL schema's allowed sites. A GraphQL token scoped to one site is sufficient to read or modify entries in another site, while deletion removes the entry across all sites.
Summary
What happened
Authorization bypass in Pixel & Tonic Craft CMS before 5.10.11 allows remote authenticated users to access content across site scopes. The saveEntry and deleteEntry resolvers read siteId directly from mutation arguments instead of passing it through ArgumentManager::prepareArguments, which filters requested sites against the GraphQL schema's allowed sites. A GraphQL token scoped to one site is sufficient to read or modify entries in another site, while deletion removes the entry across all sites.
The record
- CVE
- CVE-2026-84796
- Published
- Sep 2, 2026
- Updated
- Sep 2, 2026
- Vendor
- Pixel & Tonic
- Product
- Craft CMS
- Classifications
- CWE-639, T1078
- Attack vector
- network
- Privileges
- authenticated
Timeline
How it unfolded
- Sep 2, 2026CVE publishedPublication date reported by the CVE source.
- Sep 2, 2026Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
Compare your product and version with the public record. A matching version still requires validation against your environment.
Is a vulnerable build present?
Compare these published version ranges with your installed build and any vendor patches.
- Affected versionversion=5.0.0-RC1 <5.10.11
What conditions does exploitation require?
What is affected?
Attacks
What attackers are doing with it
Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.
Weakness, pattern, technique
Public exploit references
No public exploit references are available in this record.
Labels summarize the accepted research assessment. They do not indicate a test against your environment.
Technologies
Your stack
See the directory against your own environment.
Your stack
Check the software in your environment
Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.
Book a demo