---
id: CVE-2026-13319
title: Authorization Bypass Through User-Controlled Key in GitLab
summary: >-
  GitLab has remediated an issue in GitLab CE/EE affecting all versions from
  15.10 before 19.3.6, 19.4 before 19.4.3, and 19.5 before 19.5.1 that, could
  have allowed an authenticated to read milestone metadata, including titles,
  descriptio…
severity: medium
cvss: 4.3
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N'
cvssSource: cna
cwe:
  - CWE-639
vendor: GitLab
product: GitLab
affected:
  - GitLab >= 15.10 < 19.3.6
  - GitLab >= 19.4 < 19.4.3
  - GitLab >= 19.5 < 19.5.1
published: '2026-10-21'
updated: '2026-10-21'
sourceUpdated: '2026-10-21T23:35:25.440Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-13319'
references:
  - url: 'https://gitlab.com/gitlab-org/gitlab/-/work_items/604064'
  - url: 'https://hackerone.com/reports/3792168'
    label: 'HackerOne Bug Bounty Report #3792168'
  - url: >-
      https://docs.gitlab.com/releases/patches/patch-release-gitlab-19-5-1-released/
tags:
  - cve.org
ingestedAt: '2026-10-22T00:21:21.862Z'
---

## Overview

GitLab has remediated an issue in GitLab CE/EE affecting all versions from 15.10 before 19.3.6, 19.4 before 19.4.3, and 19.5 before 19.5.1 that, could have allowed an authenticated to read milestone metadata, including titles, descriptions, and full project paths, from arbitrary private projects across the instance without any project membership, due to missing authorization checks on a user-supplied project filter parameter in the group milestones API.

## Affected

- `GitLab >= 15.10 < 19.3.6`
- `GitLab >= 19.4 < 19.4.3`
- `GitLab >= 19.5 < 19.5.1`

## Remediation

Upgrade to versions 19.3.6, 19.4.3, 19.5.1 or above.