Description
GitLab has remediated an issue in GitLab CE/EE affecting all versions from 15.10 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 modify hidden merge requests due to incorrect authorization enforcements.
References (3)
Core 3
Core References
Exploit technical-description
exploit
permissions-required
HackerOne Bug Bounty Report #3661880
https://hackerone.com/reports/3661880
Scores
CVSS v3
5.4
EPSS
0.0030
EPSS Percentile
21.6%
Attack Vector
NETWORK
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N
CISA SSVC
Vulnrichment
Exploitation
none
Automatable
no
Technical Impact
partial
Details
CWE
CWE-863
Status
published
Products (4)
GitLab/GitLab
15.10 - 18.10.8
gitlab/gitlab
15.10.0 - 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