CVE-2026-92883

Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') in GitLab

GitLab has remediated an issue in GitLab CE/EE affecting all versions from 19.1 before 19.2.8, 19.3 before 19.3.5, and 19.4 before 19.4.2 that, under certain conditions, could have allowed an authenticated user to execute arbitrary JavaScript in the context of other users' browser sessions via a specially crafted repository, due to improper sanitization of HTML attributes in syntax-highlighted output.

Affected

GitLab

CVSS v3.1 GITLAB

8.7 HIGHCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:N

EPSS

0.27% chance of exploitation in the next 30 days, 18th percentile

Published

2026-10-13

Updated

2026-10-14

Proof-of-concept exploits (1)

• https://hackerone.com/reports/3936831

Security advisories

• https://docs.gitlab.com/releases/patches/patch-release-gitlab-19-4-2-released
• https://gitlab.com/gitlab-org/gitlab/-/work_items/629523

References

• CVE Record
• NVD entry