CVE-2026-2726

EUVD-2026-15803
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.
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
NISTPrimary
4.3 MEDIUM
NETWORK
LOW
LOW
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N
GitLabCNA
4.3 MEDIUM
NETWORK
LOW
LOW
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N
Base Score
CVSS 3.x
EPSS Score
Percentile: Unknown
Affected Products (NVD)
VendorProductVersion
gitlabgitlab
11.10.0 ≤
𝑥
< 18.8.7
gitlabgitlab
11.10.0 ≤
𝑥
< 18.8.7
gitlabgitlab
18.9.0 ≤
𝑥
< 18.9.3
gitlabgitlab
18.9.0 ≤
𝑥
< 18.9.3
gitlabgitlab
18.10.0
gitlabgitlab
18.10.0
𝑥
= Vulnerable software versions
Common Weakness Enumeration
Vulnerability Media Exposure
References
https://about.gitlab.com/releases/2026/03/25/patch-release-gitlab-18-10-1-released/
https://gitlab.com/gitlab-org/gitlab/-/work_items/590717
https://hackerone.com/reports/3543886