GitLab Community Edition/Enterprise Edition up to 18.10.7/18.11.4/19.0.1 Service Desk Email Reply substitution character

Summaryinfo

A vulnerability categorized as problematic has been discovered in GitLab Community Edition and Enterprise Edition up to 18.10.7/18.11.4/19.0.1. This affects an unknown function of the component Service Desk Email Reply Handler. Executing a manipulation can lead to substitution character. This vulnerability appears as CVE-2026-9694. The attack may be performed from remote. There is no available exploit. It is advisable to upgrade the affected component.

Detailsinfo

A vulnerability classified as problematic was found in GitLab Community Edition and Enterprise Edition up to 18.10.7/18.11.4/19.0.1. This vulnerability affects an unknown functionality of the component Service Desk Email Reply Handler. The manipulation with an unknown input leads to a substitution character vulnerability. The CWE definition for the vulnerability is CWE-153. The product receives input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could be interpreted as substitution characters when they are sent to a downstream component. As an impact it is known to affect integrity. CVE summarizes:

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.

The weakness was presented by 3nvz. The advisory is available at gitlab.com. This vulnerability was named CVE-2026-9694 since 05/27/2026. The exploitation appears to be difficult. The attack can be initiated remotely. Successful exploitation requires user interaction by the victim. The technical details are unknown and an exploit is not available.

Upgrading to version 18.10.8, 18.11.5 or 19.0.2 eliminates this vulnerability. The upgrade is hosted for download at about.gitlab.com.

If you want to get best quality of vulnerability data, you may have to visit VulDB.

Productinfo

Type

• Bug Tracking Software

Vendor

• GitLab

Name

• Community Edition
• Enterprise Edition

Version

• 18.10.0
• 18.10.1
• 18.10.2
• 18.10.3
• 18.10.4
• 18.10.5
• 18.10.6
• 18.10.7
• 18.11.0
• 18.11.1
• 18.11.2
• 18.11.3
• 18.11.4
• 19.0.0
• 19.0.1

License

• open-source

Website

• Vendor: https://gitlab.com/

CPE 2.3info

• 🔒
• 🔒
• 🔒

CPE 2.2info

• 🔒
• 🔒
• 🔒

CVSSv4info

CVSSv3info

CVSSv2info

Exploitinginfo

Threat Intelligenceinfo

Countermeasuresinfo

Timelineinfo

Sourcesinfo

Entryinfo

If you want to get best quality of vulnerability data, you may have to visit VulDB.

Discussion