CVE-2026-9694

Improper Neutralization of Substitution Characters in GitLab

State: Published
Severity: 2.6 Low
Published: Jun 11, 2026
Updated: Jun 11, 2026
Reserved: May 27, 2026

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.

Scores

CVSS	Score	Vector	Source
3.1	2.6 Low	CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:U/C:N/I:L/A:N	GitLab

Weaknesses

CWE-153 Improper Neutralization of Substitution Characters

Affected Products

Product	Versions
GitLabGitLab	15.9 to before 18.10.8Affected 18.11 to before 18.11.5Affected 19.0 to before 19.0.2Affected

References

https://gitlab.com/gitlab-org/gitlab/-/work_items/601330
HackerOne Bug Bounty Report #3685720technical-descriptionexploitpermissions-required
https://about.gitlab.com/releases/2026/06/10/patch-release-gitlab-19-0-2-released/

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