CVE-2026-2104
Authorization Bypass Through User-Controlled Key in GitLab
Description
GitLab has remediated an issue in GitLab CE/EE affecting all versions from 18.2 before 18.8.9, 18.9 before 18.9.5, and 18.10 before 18.10.3 that could have allowed an authenticated user to access confidential issues assigned to other users via CSV export due to insufficient authorization checks.
INFO
Published Date :
April 8, 2026, 11:16 p.m.
Last Modified :
April 14, 2026, 4:57 p.m.
Remotely Exploit :
Yes !
Source :
[email protected]
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS 3.1 | MEDIUM | [email protected] |
Solution
- Update GitLab to a patched version.
- Verify access controls for confidential issues.
- Apply security updates promptly.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2026-2104.
| URL | Resource |
|---|---|
| https://about.gitlab.com/releases/2026/04/08/patch-release-gitlab-18-10-3-released/ | Vendor Advisory Release Notes |
| https://gitlab.com/gitlab-org/gitlab/-/work_items/589021 | Broken Link |
| https://hackerone.com/reports/3541476 | Permissions Required |
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-2104 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-2104
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-2104 vulnerability anywhere in the article.
-
Daily CyberSecurity
Security Alert: GitLab Issues Patch for High-Severity Vulnerabilities Across CE and EE
GitLab has released critical security updates for Community Edition (CE) and Enterprise Edition (EE). Versions 18.10.3, 18.9.5, and 18.8.9 address multiple high and medium-severity flaws that could co ... Read more
The following table lists the changes that have been made to the
CVE-2026-2104 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
Initial Analysis by [email protected]
Apr. 14, 2026
Action Type Old Value New Value Added CPE Configuration OR *cpe:2.3:a:gitlab:gitlab:*:*:*:*:enterprise:*:*:* versions from (including) 18.9.0 up to (excluding) 18.9.5 *cpe:2.3:a:gitlab:gitlab:*:*:*:*:enterprise:*:*:* versions from (including) 18.10.0 up to (excluding) 18.10.3 *cpe:2.3:a:gitlab:gitlab:*:*:*:*:enterprise:*:*:* versions from (including) 18.2.0 up to (excluding) 18.8.9 Added CPE Configuration OR *cpe:2.3:a:gitlab:gitlab:*:*:*:*:community:*:*:* versions from (including) 18.10.0 up to (excluding) 18.10.3 *cpe:2.3:a:gitlab:gitlab:*:*:*:*:community:*:*:* versions from (including) 18.9.0 up to (excluding) 18.9.5 *cpe:2.3:a:gitlab:gitlab:*:*:*:*:community:*:*:* versions from (including) 18.2.0 up to (excluding) 18.8.9 Added Reference Type GitLab Inc.: https://about.gitlab.com/releases/2026/04/08/patch-release-gitlab-18-10-3-released/ Types: Release Notes, Vendor Advisory Added Reference Type GitLab Inc.: https://gitlab.com/gitlab-org/gitlab/-/work_items/589021 Types: Broken Link Added Reference Type GitLab Inc.: https://hackerone.com/reports/3541476 Types: Permissions Required -
New CVE Received by [email protected]
Apr. 08, 2026
Action Type Old Value New Value Added Description GitLab has remediated an issue in GitLab CE/EE affecting all versions from 18.2 before 18.8.9, 18.9 before 18.9.5, and 18.10 before 18.10.3 that could have allowed an authenticated user to access confidential issues assigned to other users via CSV export due to insufficient authorization checks. Added CVSS V3.1 AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N Added CWE CWE-639 Added Reference https://about.gitlab.com/releases/2026/04/08/patch-release-gitlab-18-10-3-released/ Added Reference https://gitlab.com/gitlab-org/gitlab/-/work_items/589021 Added Reference https://hackerone.com/reports/3541476