CVE-2026-10086

EUVD-2026-39181
GitLab has remediated an issue in GitLab EE affecting all versions from 16.4 before 18.11.6, 19.0 before 19.0.3, and 19.1 before 19.1.1 that under certain conditions could have allowed an authenticated user with developer-role permissions to execute arbitrary client-side code in the context of another user's session, due to improper sanitization of user-supplied input.
Cross-site Scripting
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
GitLabCNA
8.7 HIGH
NETWORK
LOW
LOW
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:N
Base Score
CVSS 3.x
EPSS Score
Percentile: 19%
Early Detection
Affected products identified ahead of NVD analysis through intelligence sources.
VendorProductVersionSource
gitlabgitlab
16.4 ≤
𝑥
< 18.11.6
CNA
gitlabgitlab
19.0 ≤
𝑥
< 19.0.3
CNA
gitlabgitlab
19.1 ≤
𝑥
< 19.1.1
CNA
Common Weakness Enumeration
Vulnerability Media Exposure
References
https://docs.gitlab.com/releases/patches/patch-release-gitlab-19-1-1-released/
https://gitlab.com/gitlab-org/gitlab/-/work_items/601634
https://hackerone.com/reports/3734800