High severity · published Jun 11, 2026
CVE-2026-8589
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') in GitLab
8.7
CVSS
0.3%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:N
Attack vector
Network
Complexity
Low
Privileges
Low
User interaction
Required
Confidentiality
High
Integrity
High
Availability
None
Scope
Changed
Exploitation
Is it being used?
Exploit prediction (EPSS)0.3% · higher than 17% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
GI
GitLab · GitLab
13.1.4 before 18.10.8; 18.11 before 18.11.5; 19.0 before 19.0.2 · source: vendor, NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-8589
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-8589
Release Notes
https://about.gitlab.com/releases/2026/06/10/patch-release-gitlab-19-0-2-released/
Issue Tracking
https://gitlab.com/gitlab-org/gitlab/-/work_items/600099
Permissions Required
https://hackerone.com/reports/3722842
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