Cross-site scripting in Gitlab Community Edition and GitLab Enterprise Edition - CVE-2026-8589
Published: June 11, 2026
Vulnerability identifier: #VU134374
CSH Severity: Low
CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:P/PR:H/UI:P/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N/E:U/U:Clear
CVE-ID: CVE-2026-8589
CWE-ID: CWE-79
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vendor: GitLab, Inc
Affected software:
Gitlab Community Edition
GitLab Enterprise Edition
Gitlab Community Edition
GitLab Enterprise Edition
Detailed vulnerability description
The vulnerability allows a remote user to add unauthorized email addresses to a targeted user's account.
The vulnerability exists due to improper neutralization of input during web page generation in certain group setting fields when processing user-supplied input. A remote privileged user can inject crafted input to add unauthorized email addresses to a targeted user's account.
User interaction is required.
How to mitigate CVE-2026-8589
Install security update from vendor's website.