PT-2026-40873 · Gitlab · Gitlab Ce/Ee

CVE-2026-6335 · Published 2026-05-14 · Updated 2026-05-18

Positive Technologies (AI Summary)

CVSS v2.0

5.5

Medium

Base vector

AV:N/AC:L/Au:S/C:P/I:P/A:N

Name of the Vulnerable Software and Affected Versions GitLab CE/EE versions 18.11 through 18.11.2

Description Improper sanitization in GitLab CE/EE allows an authenticated user to execute arbitrary code in another user's browser session. This is a Cross-site Scripting (XSS) issue, which occurs when an application includes untrusted data in a web page without proper validation or encoding.

Recommendations Update to version 18.11.3.

Exploit

Fix

XSS

Weakness Enumeration

CWE-79

Related Identifiers

BDU:2026-07022

BIT-GITLAB-2026-6335

CVE-2026-6335

Affected Products

Gitlab Ce/Ee

References · 10

• 🔥 https://hackerone.com/reports/3673647 · Exploit
• https://cve.org/CVERecord?id=CVE-2026-6335 · Security Note
• https://ubuntu.com/security/CVE-2026-6335 · Vendor Advisory
• https://osv.dev/vulnerability/UBUNTU-CVE-2026-6335 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2026-6335 · Security Note
• https://bdu.fstec.ru/vul/2026-07022 · Security Note
• https://osv.dev/vulnerability/BIT-gitlab-2026-6335 · Vendor Advisory
• https://about.gitlab.com/releases/2026/05/13/patch-release-gitlab-18-11-3-released · Note
• https://gitlab.com/gitlab-org/gitlab/-/work_items/596760 · Note
• https://t.me/CVEtracker/53744 · Telegram Post