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PatchSiren cyber security CVE debrief

CVE-2026-6552 GitLab CVE debrief

CVE-2026-6552 is a HIGH-severity vulnerability in GitLab EE's Group SAML identity management functionality. An authenticated user with the Group Owner role could, under certain conditions, take over another group member's GitLab account due to improper authorization.

Vendor
GitLab
Product
Unknown
CVSS
HIGH 8.7
CISA KEV
Not listed in stored evidence
Original CVE published
2026-06-11
Original CVE updated
2026-07-31
Advisory published
2026-06-11
Advisory updated
2026-07-31

Who should care

Administrators and users of GitLab EE versions from 15.5 before 18.10.8, 18.11 before 18.11.5, and 19.0 before 19.0.2 should be aware of this vulnerability and take necessary actions.

Technical summary

The vulnerability is caused by improper authorization in the Group SAML identity management functionality of GitLab EE. This allows an authenticated user with the Group Owner role to potentially take over another group member's GitLab account.

Defensive priority

HIGH

Recommended defensive actions

  • Upgrade to GitLab EE version 18.10.8, 18.11.5, or 19.0.2, or later.
  • Review and adjust Group SAML identity management settings.
  • Monitor for suspicious activity related to Group SAML identity management.

Evidence notes

The CVE-2026-6552 vulnerability has been analyzed and verified by GitLab and the NVD.

Sources and references

Verified primary and authoritative sources

  • CVE-2026-6552 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-6552

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

  • CVE-2026-6552 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-6552

    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.