CVE-2026-9694

LOW

Improper Neutralization of Substitution Characters in GitLab

Title source: cna

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.

References (3)

Core 3

Core References

https://gitlab.com/gitlab-org/gitlab/-/work_items/601330

Exploit technical-description exploit permissions-required

HackerOne Bug Bounty Report #3685720

https://hackerone.com/reports/3685720

https://about.gitlab.com/releases/2026/06/10/patch-release-gitlab-19-0-2-released/

Scores

CVSS v3 2.6

EPSS 0.0021

EPSS Percentile 11.3%

Attack Vector NETWORK

CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:U/C:N/I:L/A:N

CISA SSVC

Vulnrichment

Exploitation none

Automatable no

Technical Impact partial

Details

CWE

CWE-153

Status published

Products (4)

GitLab/GitLab 15.9 - 18.10.8

gitlab/gitlab 15.9.0 - 18.10.8 (2 CPE variants)

GitLab/GitLab 18.11 - 18.11.5

GitLab/GitLab 19.0 - 19.0.2

Published Jun 11, 2026

Tracked Since Jun 11, 2026