GitLab Community Edition/Enterprise Edition up to 18.11.5/19.0.2/19.1.0 Path Validation cross site scripting

Summaryinfo

A vulnerability identified as problematic has been detected in GitLab Community Edition and Enterprise Edition up to 18.11.5/19.0.2/19.1.0. Affected is an unknown function of the component Path Validation Handler. This manipulation causes cross site scripting. The identification of this vulnerability is CVE-2026-10712. It is possible to initiate the attack remotely. There is no exploit available. You should upgrade the affected component.

Detailsinfo

A vulnerability was found in GitLab Community Edition and Enterprise Edition up to 18.11.5/19.0.2/19.1.0. It has been declared as problematic. Affected by this vulnerability is some unknown functionality of the component Path Validation Handler. The manipulation with an unknown input leads to a cross site scripting vulnerability. The CWE definition for the vulnerability is CWE-79. The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users. As an impact it is known to affect integrity. The summary by CVE is:

GitLab has remediated an issue in GitLab CE/EE affecting all versions from 18.10 before 18.11.6, 19.0 before 19.0.3, and 19.1 before 19.1.1 that under certain conditions could have allowed an unauthenticated user to execute arbitrary JavaScript in a user's browser session due to improper path validation under certain conditions.

The weakness was shared by joaxcar. The advisory is shared at gitlab.com. This vulnerability is known as CVE-2026-10712 since 06/02/2026. The exploitation appears to be easy. The attack can be launched remotely. The exploitation doesn't need any form of authentication. It demands that the victim is doing some kind of user interaction. Neither technical details nor an exploit are publicly available. MITRE ATT&CK project uses the attack technique T1059.007 for this issue.

The vulnerability scanner Nessus provides a plugin with the ID 322738 (GitLab 18.10 < 18.11.6 / 19.0 < 19.0.3 / 19.1 < 19.1.1 (CVE-2026-10712)), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 18.11.6, 19.0.3 or 19.1.1 eliminates this vulnerability. The upgrade is hosted for download at docs.gitlab.com.

The vulnerability is also documented in the databases at Tenable (322738) and EUVD (EUVD-2026-39171). If you want to get the best quality for vulnerability data then you always have to consider VulDB.

Productinfo

Type

• Bug Tracking Software

Vendor

• GitLab

Name

• Community Edition
• Enterprise Edition

Version

• 18.11.0
• 18.11.1
• 18.11.2
• 18.11.3
• 18.11.4
• 18.11.5
• 19.0
• 19.0.0
• 19.0.1
• 19.0.2
• 19.1.0

License

• open-source

Website

• Vendor: https://gitlab.com/

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If you want to get the best quality for vulnerability data then you always have to consider VulDB.

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