CVE-2026-6896

EUVD-2026-42407
GitLab has remediated an issue in GitLab EE affecting all versions from 13.11 before 18.11.7, 19.0 before 19.0.4, and 19.1 before 19.1.2 that under certain conditions could have allowed an authenticated user with developer-role permissions to execute arbitrary scripts in another user's browser session due to improper sanitization of user-supplied input.
Cross-site Scripting
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
NISTPrimary
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: 32.33%
Affected Products (NVD)
VendorProductVersion
gitlabgitlab
13.11.0 ≤
𝑥
< 18.11.7
gitlabgitlab
19.0.0 ≤
𝑥
< 19.0.4
gitlabgitlab
19.1.0 ≤
𝑥
< 19.1.2
𝑥
= Vulnerable software versions
Ubuntu logo
Ubuntu Releases
Ubuntu Product
Codename
gitlab
jammy
dne
noble
dne
questing
dne
resolute
dne
Common Weakness Enumeration
References
https://docs.gitlab.com/releases/patches/patch-release-gitlab-19-1-2-released/
https://gitlab.com/gitlab-org/gitlab/-/work_items/597887
https://hackerone.com/reports/3682085