User Data Exposure in Craft CMS Prior to Version 5.11.0
CVE-2026-84799

5.3MEDIUM

Key Information:

Vendor

Craftcms

Status
Cms
Vendor
CVE Published:
2 September 2026

What is CVE-2026-84799?

Craft CMS versions prior to 5.11.0 contain a vulnerability that fails to enforce user-group scope filters on native GraphQL user relations. This oversight allows attackers with a scoped GraphQL token to exploit the system by accessing sensitive information, such as usernames, email addresses, and full names of content authors and uploaders, including those with administrative privileges. This breach poses significant risks to user privacy and underscores the need for robust data protection measures in web applications.

Affected Version(s)

cms 5.0.0-RC1 < 5.11.0

cms 5.11.0

References

https://github.com/craftcms/cms/security/advisories/GHSA-...
vendor-advisory
https://www.vulncheck.com/advisories/craft-cms-before-5.1...
third-party-advisory

CVSS V4

Score:
5.3
Severity:
MEDIUM
Confidentiality:
Low
Integrity:
None
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.