What’s Vulnerable › Vulnerabilities

CVE-2026-9694: Improper Neutralization of Substitution Characters in GitLab

• Severity: medium (CVSS 4.3 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.2% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-06-11 · updated 2026-06-17
• Weakness: CWE-153

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

• GitLab: from 15.9.0 before 18.10.8; from 18.11.0 before 18.11.5; from 19.0.0 before 19.0.2 — fixed in 18.10.8, 18.11.5, 19.0.2

How to fix

Upgrade to a fixed version: GitLab 18.10.8, 18.11.5, 19.0.2. Check the vendor advisory for mitigations.

References

• https://about.gitlab.com/releases/2026/06/10/patch-release-gitlab-19-0-2-released/
• https://gitlab.com/gitlab-org/gitlab/-/work_items/601330
• https://hackerone.com/reports/3685720

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