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PatchSiren cyber security CVE debrief

CVE-2026-84799 craftcms CVE debrief

Craft CMS before 5.11.0 fails to enforce user-group scope filters on native GraphQL user relations including author, authors, uploader, draftCreator, and revisionCreator fields. Attackers with a scoped GraphQL token can query these relations to read usernames, email addresses, and full names of any content author or uploader including administrators. This vulnerability could lead to potential information disclosure. The CVE record was published on 2026-09-02T12:17:16.637Z and has not been modified since then. The NVD entry is currently Deferred. Users should verify the affected versions and configurations of Craft CMS to assess potential exposure and prioritize patching to prevent potential information disclosure.

Vendor
craftcms
Product
cms
CVSS
MEDIUM 5.3
CISA KEV
Not listed in stored evidence
Original CVE published
2026-09-02
Original CVE updated
2026-09-04
Advisory published
2026-09-02
Advisory updated
2026-09-04

Who should care

Users of Craft CMS versions before 5.11.0 should prioritize patching to prevent potential information disclosure via GraphQL user relations. This includes administrators, developers, and security teams responsible for maintaining and securing Craft CMS installations. Additionally, operators and platform administrators should be aware of the potential risks and take necessary precautions to protect sensitive information.

Technical summary

Craft CMS before 5.11.0 fails to enforce user-group scope filters on native GraphQL user relations including author, authors, uploader, draftCreator, and revisionCreator fields. Attackers with a scoped GraphQL token can query these relations to read usernames, email addresses, and full names of any content author or uploader including administrators. This vulnerability could lead to potential information disclosure.

Defensive priority

CVE-2026-84799 is rated as MEDIUM with a CVSS score of 5.3. Users should prioritize patching to prevent potential information disclosure.

Recommended defensive actions

  • Patch to version 5.11.0 or later
  • Review user-group scope filters for GraphQL user relations
  • Monitor for potential information disclosure attempts
  • Review compensating controls for exposed systems while remediation is scheduled and verified
  • Check relevant monitoring, detection, and logs for exposed assets that need extra review
  • Track exceptions, retest remediated assets, and close the item only after evidence is documented
  • Confirm whether affected product deployments exist in managed environments and assign an owner for follow-up

Evidence notes

Evidence is based on CVE Program and NVD records. Further verification is recommended to confirm affected systems and validate vendor remediation. The CVE record was published on 2026-09-02T12:17:16.637Z and has not been modified since then. The NVD entry is currently Deferred. Users should verify the affected versions and configurations of Craft CMS to assess potential exposure.

Sources and references

Verified primary and authoritative sources

  • CVE-2026-84799 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-84799

    CVE Program - Official CVE Program record with source-provided CVE metadata.

  • CVE-2026-84799 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-84799

    NIST National Vulnerability Database - Official NIST NVD detail page and source-specific vulnerability assessment.

Supplemental references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.