Description
GitLab has remediated an issue in GitLab CE/EE affecting all versions from 11.10 before 18.8.7, 18.9 before 18.9.3, and 18.10 before 18.10.1 that could have allowed an authenticated user to perform unauthorized actions on merge requests in other projects due to improper access control during cross-repository operations.
References (3)
Core 3
Core References
Exploit technical-description
exploit
permissions-required
HackerOne Bug Bounty Report #3543886
https://hackerone.com/reports/3543886
Scores
CVSS v3
4.3
EPSS
0.0019
EPSS Percentile
9.2%
Attack Vector
NETWORK
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N
CISA SSVC
Vulnrichment
Exploitation
none
Automatable
no
Technical Impact
partial
Details
CWE
CWE-863
Status
published
Products (5)
gitlab/gitlab
18.10.0 (2 CPE variants)
GitLab/GitLab
11.10 - 18.8.7
gitlab/gitlab
11.10.0 - 18.8.7 (2 CPE variants)
GitLab/GitLab
18.10 - 18.10.1
GitLab/GitLab
18.9 - 18.9.3
Published
Mar 25, 2026
Tracked Since
Mar 25, 2026