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PatchSiren cyber security CVE debrief

CVE-2026-6713 GitLab CVE debrief

GitLab has remediated an authorization bypass vulnerability in GitLab Community Edition (CE) and Enterprise Edition (EE) that could allow unauthorized users to enumerate private projects. The issue stems from incorrect authorization checks under certain conditions. The vulnerability affects versions 18.2 through 18.10.6, 18.11 through 18.11.3, and version 19.0.0. GitLab released patches on May 27, 2026 in versions 18.10.7, 18.11.4, and 19.0.1. The vulnerability was reported through HackerOne and assigned CWE-863 (Incorrect Authorization). No known exploitation in the wild or ransomware campaign use has been documented.

Vendor
GitLab
Product
Unknown
CVSS
MEDIUM 5.3
CISA KEV
Not listed in stored evidence
Original CVE published
2026-05-27
Original CVE updated
2026-05-27
Advisory published
2026-05-27
Advisory updated
2026-05-27

Who should care

Organizations running self-managed GitLab instances with private repositories should prioritize patching, particularly those in regulated industries or with sensitive intellectual property. Security teams should audit for potential information disclosure that could aid reconnaissance for subsequent attacks. GitLab.com SaaS users are protected as GitLab manages infrastructure patching.

Technical summary

This vulnerability exists in GitLab's authorization layer where incorrect access control checks could allow an unauthenticated or unauthorized user to enumerate private projects—gaining knowledge of project names, paths, or existence without proper permissions. The flaw affects multiple version branches: 18.2.x through 18.10.6, 18.11.x through 18.11.3, and the initial 19.0.0 release. The CVSS 3.1 score of 5.3 (Medium) reflects network accessibility with low attack complexity, no required privileges, and low confidentiality impact (information disclosure only, no data modification or service disruption). GitLab addressed the root cause through improved authorization checks in the patched releases.

Defensive priority

medium

Recommended defensive actions

  • Upgrade GitLab CE/EE to version 18.10.7, 18.11.4, or 19.0.1 or later
  • Review access logs for unauthorized project enumeration attempts prior to patching
  • Verify that private project visibility settings remain as intended after upgrade
  • Monitor for any anomalous access patterns to private repositories

Evidence notes

The CVE description and NVD record confirm affected version ranges and the nature of the authorization bypass. GitLab's vendor advisory provides patch availability details. The HackerOne reference indicates responsible disclosure through their bug bounty program.

Sources and references

Verified primary and authoritative sources

  • CVE-2026-6713 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-6713

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

  • CVE-2026-6713 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-6713

    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.