CVE-2026-2104

MEDIUM

Authorization Bypass Through User-Controlled Key in GitLab

Title source: cna

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.

References (3)

Core 3

Core References

Exploit technical-description exploit permissions-required

HackerOne Bug Bounty Report #3541476

https://hackerone.com/reports/3541476

https://gitlab.com/gitlab-org/gitlab/-/work_items/589021

https://about.gitlab.com/releases/2026/04/08/patch-release-gitlab-18-10-3-released/

Scores

CVSS v3 4.3

EPSS 0.0026

EPSS Percentile 17.5%

Attack Vector NETWORK

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N

CISA SSVC

Vulnrichment

Exploitation none

Automatable no

Technical Impact partial

Details

CWE

CWE-639

Status published

Products (4)

GitLab/GitLab 18.10 - 18.10.3

GitLab/GitLab 18.2 - 18.8.9

gitlab/gitlab 18.2.0 - 18.8.9 (2 CPE variants)

GitLab/GitLab 18.9 - 18.9.5

Published Apr 08, 2026

Tracked Since Apr 09, 2026