CVE-2026-9694 PUBLISHED

Improper Neutralization of Substitution Characters in GitLab

Assigner: GitLab
Reserved: 27.05.2026 Published: 11.06.2026 Updated: 11.06.2026

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.

Metrics

CVSS 3.1

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

Attack Vector	Network	Scope	Unchanged
Attack Complexity	High	Confidentiality Impact	None
Privileges Required	Low	Integrity Impact	Low
User Interaction	Required	Availability Impact	None

CVSS 3.1

Product Status

Vendor	GitLab
Product	GitLab
Versions	Default: unaffected affected from 15.9 to 18.10.8 (excl.) affected from 18.11 to 18.11.5 (excl.) affected from 19.0 to 19.0.2 (excl.)

Solutions

Upgrade to versions 18.10.8, 18.11.5, 19.0.2 or above.

Credits

Thanks [3nvz](https://hackerone.com/3nvz) for reporting this vulnerability through our HackerOne bug bounty program finder

References

Problem Types

CWE-153: Improper Neutralization of Substitution Characters CWE