CVE-2026-78252

EUVD-2026-80222
GitLab has remediated an issue in GitLab CE/EE affecting all versions from 15.3 before 19.1.8, 19.2 before 19.2.6, and 19.3 before 19.3.2 that, under certain conditions, an authenticated user could have induced a targeted user to perform unintended state-changing HTTP requests due to improper sanitization of user-controlled data in the Markdown JSON table renderer.
Cross-site Scripting
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
NISTPrimary
8.2 HIGH
NETWORK
HIGH
NONE
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:H/I:H/A:L
Base Score
CVSS 3.x
EPSS Score
Percentile: 19.2%
Affected Products (NVD)
VendorProductVersion
gitlabgitlab
15.3.0 ≤
𝑥
< 19.1.8
gitlabgitlab
19.2.0 ≤
𝑥
< 19.2.6
gitlabgitlab
19.3.0 ≤
𝑥
< 19.3.2
𝑥
= Vulnerable software versions
Common Weakness Enumeration
References
https://docs.gitlab.com/releases/patches/patch-release-gitlab-19-3-2-released/
https://gitlab.com/gitlab-org/gitlab/-/work_items/621447
https://hackerone.com/reports/3917471