PatchSiren

PatchSiren cyber security CVE debrief

CVE-2026-2900 GitLab CVE debrief

A low-severity vulnerability was discovered in GitLab EE, affecting versions from 16.10 before 18.9.7, 18.10 before 18.10.6, and 18.11 before 18.11.3. The issue allowed an authenticated user with Maintainer permissions to modify or delete project approval rules due to missing authorization checks when instance-level approval rule editing prevention was enabled.

Vendor
GitLab
Product
Unknown
CVSS
LOW 2.7
CISA KEV
Not listed in stored evidence
Original CVE published
2026-05-14
Original CVE updated
2026-05-14
Advisory published
2026-05-14
Advisory updated
2026-05-14

Who should care

Administrators and users of GitLab EE versions from 16.10 before 18.9.7, 18.10 before 18.10.6, and 18.11 before 18.11.3 should be aware of this vulnerability and take necessary actions to remediate it.

Technical summary

The vulnerability has a CVSS score of 2.7 and is classified as LOW severity. It is related to missing authorization checks (CWE-862) and can be exploited by an authenticated user with Maintainer permissions.

Defensive priority

LOW

Recommended defensive actions

  • Update to a patched version of GitLab EE (18.9.7, 18.10.6, or 18.11.3) to remediate the vulnerability.
  • Review and adjust instance-level approval rule editing prevention settings to ensure proper authorization checks are in place.

Evidence notes

The vulnerability was reported through HackerOne and remediated by GitLab.

Sources and references

Verified primary and authoritative sources

  • CVE-2026-2900 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-2900

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

  • CVE-2026-2900 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-2900

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

Supplemental references

  • Source item URL

    Unverified legacy reference

    URL: https://github.com/advisories/GHSA-8xwh-m77v-v26p

    github_advisory_database

  • Source reference

    Unverified legacy reference

    URL: https://hackerone.com/reports/3561092

    Reference

  • Source reference

    Unverified legacy reference

    URL: https://about.gitlab.com/releases/2026/05/13/patch-release-gitlab-18-11-3-released

    Reference

  • Source reference

    Unverified legacy reference

    URL: https://gitlab.com/gitlab-org/gitlab/-/work_items/590983

    Reference

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.