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PatchSiren cyber security CVE debrief

CVE-2026-6269 GitLab CVE debrief

CVE-2026-6269 is a medium-severity vulnerability in GitLab CE/EE that could allow an authenticated user with developer-role permissions to modify hidden merge requests due to incorrect authorization enforcements. The vulnerability affects all versions from 15.10 before 18.10.8, 18.11 before 18.11.5, and 19.0 before 19.0.2.

Vendor
GitLab
Product
Unknown
CVSS
MEDIUM 5.4
CISA KEV
Not listed in stored evidence
Original CVE published
2026-06-11
Original CVE updated
2026-06-15
Advisory published
2026-06-11
Advisory updated
2026-06-15

Who should care

Users of GitLab CE/EE versions from 15.10 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 steps to remediate it.

Technical summary

The vulnerability is caused by incorrect authorization enforcements in GitLab CE/EE, allowing an authenticated user with developer-role permissions to modify hidden merge requests. The CVSS score for this vulnerability is 5.4, indicating a medium severity.

Defensive priority

medium

Recommended defensive actions

  • Update to a patched version of GitLab CE/EE (18.10.8, 18.11.5, or 19.0.2 or later)
  • Review and update permissions for developer-role users

Evidence notes

Evidence for this vulnerability comes from the NVD and CVE.org.

Sources and references

Verified primary and authoritative sources

  • CVE-2026-6269 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-6269

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

  • CVE-2026-6269 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-6269

    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.