Vulnerability · Published Jun 11, 2026 · Assigned by GitLab
CVE-2026-9694Improper Neutralization of Substitution Characters in GitLab
Low 2.6
In plain English
A low-severity security flaw in GitLab from GitLab. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.2% (higher than 11% of all known vulnerabilities).
Official description
GitLab has remediated an issue in GitLab CE/EE affecting all versions from 15.9 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 unauthenticated user to impersonate the GitLab Support Bot and inject arbitrary content via a specially crafted Service Desk email reply due to improper neutralization in email template processing.
Affected products (as reported)
Weakness: CWE-153 · Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:U/C:N/I:L/A:N
References
- https://gitlab.com/gitlab-org/gitlab/-/work_items/601330
- HackerOne Bug Bounty Report #3685720 technical-description, exploit, permissions-required
- https://about.gitlab.com/releases/2026/06/10/patch-release-gitlab-19-0-2-released/