PT-2026-40873 · Gitlab · Gitlab

Published 2026-05-14 · Updated 2026-05-14 · CVE-2026-6335

Mitre

CVSS v3.1

5.4

Medium

Base vector

AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N

GitLab has remediated an issue in GitLab CE/EE affecting all versions from 18.11 before 18.11.3 that under certain conditions could have allowed an authenticated user to execute arbitrary code in another user's browser session due to improper sanitization.

Exploit

Fix

XSS

Weakness Enumeration

CWE-79

Related Identifiers

CVE-2026-6335

Affected Products

Gitlab

References · 4

• 🔥 https://hackerone.com/reports/3673647 · Exploit
• https://nvd.nist.gov/vuln/detail/CVE-2026-6335 · Security Note
• https://gitlab.com/gitlab-org/gitlab/-/work_items/596760 · Note
• https://about.gitlab.com/releases/2026/05/13/patch-release-gitlab-18-11-3-released · Note