CVE-2026-6976

LOW

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 15.9 before 18.10.8, 18.11 before 18.11.5, and 19.0 before 19.0.2 that under certain conditions could have allowed an authenticated user with developer-role permissions to hide changes from merge request diff views due to improper input handling of file names.

References (3)

Core 3

Core References

https://gitlab.com/gitlab-org/gitlab/-/work_items/598165

Exploit technical-description exploit permissions-required

HackerOne Bug Bounty Report #3638136

https://hackerone.com/reports/3638136

https://about.gitlab.com/releases/2026/06/10/patch-release-gitlab-19-0-2-released/

Scores

CVSS v3 3.7

EPSS 0.0025

EPSS Percentile 15.7%

Attack Vector NETWORK

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

CISA SSVC

Vulnrichment

Exploitation none

Automatable no

Technical Impact partial

Details

CWE

CWE-639

Status published

Products (4)

GitLab/GitLab 15.9 - 18.10.8

gitlab/gitlab 15.9.0 - 18.10.8 (2 CPE variants)

GitLab/GitLab 18.11 - 18.11.5

GitLab/GitLab 19.0 - 19.0.2

Published Jun 11, 2026

Tracked Since Jun 11, 2026