CVE-2026-92883

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

State: Published
Severity: 8.7 High
Published: Oct 13, 2026
Updated: Oct 14, 2026
Reserved: Sep 17, 2026

Description

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.

Scores

CVSS	Score	Vector	Source
3.1	8.7 High	CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:N	GitLab

Weaknesses

CWE-79 Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

Affected Products

Product	Versions
GitLabGitLab	19.1 to before 19.2.8Affected 19.3 to before 19.3.5Affected 19.4 to before 19.4.2Affected

References

https://gitlab.com/gitlab-org/gitlab/-/work_items/629523
HackerOne Bug Bounty Report #3936831technical-descriptionexploitpermissions-required
https://docs.gitlab.com/releases/patches/patch-release-gitlab-19-4-2-released/

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