CVE-2026-8589 Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') in GitLab
An authenticated user can exploit XSS in GitLab group settings to add unauthorized email addresses to another user's account, potentially leading to account takeover.
- Exploited in the wild
- Not known
- Login needed
- An administrator
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- Available
What is CVE-2026-8589?
CVE-2026-8589 is a high-severity cross-site scripting vulnerability in Gitlab Gitlab, published on 11 Jun 2026. An attacker needs administrator access to exploit it, and only if a user opens a file or follows a link.
Official 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.
Weakness: CWE-79
Which versions are affected by CVE-2026-8589?
1 open source package ship an affected version, including gitlab. It affects 1 product.
| Package | Affected | Fixed in |
|---|---|---|
gitlab Bitnami | From 13.1.4 | 18.10.8, 18.11.5, 19.0.2 |
Products include Gitlab Gitlab.
How do I fix CVE-2026-8589?
Upgrade gitlab to a fixed version for your release line: 18.10.8, 18.11.5 or 19.0.2.
Escape output for the context it lands in and set a strict Content Security Policy. Upgrading the affected component is the real fix. More about Cross-site scripting.
Is CVE-2026-8589 being exploited?
There is no known exploitation of CVE-2026-8589 in the wild and no public exploit code.
Other vulnerabilities in Gitlab Gitlab
- CVE-2026-97229 GitLab Community Edition and Enterprise Edition Integer Overflow or Wraparound
- CVE-2026-85706 GitLab Community Edition and Enterprise Edition Path Traversal
- CVE-2023-7028 GitLab Community and Enterprise Editions Improper Access Control
- CVE-2021-22205 GitLab Community and Enterprise Editions Remote Code Execution
- CVE-2021-39935 GitLab Community and Enterprise Editions Server-Side Request Forgery (SSRF)
Sources
Also known as BIT-gitlab-2026-8589, GHSA-q9j8-24p8-jq8j, MINI-3g6f-m4q6-gvgr, MINI-3qh4-4jw2-fxwq, MINI-3xpq-phw3-gwhg, MINI-427q-pqw9-p699 and 41 more.