CVE-2026-1230

EUVD-2026-11182
GitLab has remediated an issue in GitLab CE/EE affecting all versions from 1.0 before 18.7.6, 18.8 before 18.8.6, and 18.9 before 18.9.2 that could have allowed an authenticated user to cause repository downloads to contain different code than displayed in the web interface due to incorrect validation of branch references under certain circumstances.
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
NISTPrimary
4.1 MEDIUM
NETWORK
LOW
LOW
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:N/I:L/A:N
Base Score
CVSS 3.x
EPSS Score
Percentile: Unknown
Affected Products (NVD)
VendorProductVersion
gitlabgitlab
1.0.0 ≤
𝑥
< 18.7.6
gitlabgitlab
1.0.0 ≤
𝑥
< 18.7.6
gitlabgitlab
18.8.0 ≤
𝑥
< 18.8.6
gitlabgitlab
18.8.0 ≤
𝑥
< 18.8.6
gitlabgitlab
18.9.0 ≤
𝑥
< 18.9.2
gitlabgitlab
18.9.0 ≤
𝑥
< 18.9.2
𝑥
= Vulnerable software versions
Debian logo
Debian Releases
Debian Product
Codename
gitlab
sid
vulnerable
Common Weakness Enumeration
References
https://about.gitlab.com/releases/2026/03/11/patch-release-gitlab-18-9-2-released/
https://gitlab.com/gitlab-org/gitlab/-/work_items/587002
https://hackerone.com/reports/3505165