CVE-2026-8589
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') in GitLab
8.7
HIGH
CVSS 3.1
Description
GitLab has remediated an issue in GitLab EE affecting all versions from 13.1.4 before 18.10.8, 18.11 before 18.11.5, and 19.0 before 19.0.2 that under certain conditions could have allowed an authenticated user to add unauthorized email addresses to a targeted user's account due to improper sanitization of user-supplied input in certain group setting fields.
How to fix CVE-2026-8589
To remediate CVE-2026-8589, upgrade the affected package to a fixed version below.
- —upgrade to 18.10.8 or later
Is CVE-2026-8589 being exploited?
No exploitation signal available. Neither CISA KEV nor a current EPSS score has been published for CVE-2026-8589.
Affected packages (1)
- >= 13.1.4, < 18.10.8, >= 18.11.0, < 18.11.5, >= 19.0.0, < 19.0.2
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 3.1 | HIGH8.7 | CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:N |