Cross-site scripting in Gitlab Community Edition and GitLab Enterprise Edition - CVE-2026-5262
Published: May 18, 2026
Vulnerability identifier: #VU131654
CSH Severity: Medium
CVSS v4: 2.1 [CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:A/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N]
CVE-ID: CVE-2026-5262
CWE-ID: CWE-79
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to access tokens in the Storybook development environment.
The vulnerability exists due to improper input validation in Storybook when rendering content under certain conditions. A remote attacker can supply crafted input to access tokens in the Storybook development environment.
User interaction is required.
Affected software
Gitlab Community Edition
GitLab Enterprise Edition
GitLab Enterprise Edition
How to mitigate CVE-2026-5262
Install security update from vendor's website.
Gitlab Community Edition - addressed in versions 18.9.6, 18.10.4, 18.11.1
GitLab Enterprise Edition - addressed in versions 18.9.6, 18.10.4, 18.11.1
GitLab Enterprise Edition - addressed in versions 18.9.6, 18.10.4, 18.11.1