CVE-2026-6896

Received Received - Intake

Cross-Site Scripting in GitLab EE

Publication date: 2026-07-08

Last updated on: 2026-07-08

Assigner: GitLab Inc.

Description

GitLab has remediated an issue in GitLab EE affecting all versions from 13.11 before 18.11.7, 19.0 before 19.0.4, and 19.1 before 19.1.2 that under certain conditions could have allowed an authenticated user with developer-role permissions to execute arbitrary scripts in another user's browser session due to improper sanitization of user-supplied input.

CVSS Scores

EPSS Scores

Probability:
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Meta Information

Published

2026-07-08

Last Modified

2026-07-08

Generated

2026-07-09

AI Q&A

2026-07-09

EPSS Evaluated

N/A

NVD

CVE-2026-6896

Affected Vendors & Products

Vendor	Product	Version / Range
gitlab	gitlab_ee	From 13.11 (inc) to 18.11.7 (exc)
gitlab	gitlab_ee	From 19.0 (inc) to 19.0.4 (exc)
gitlab	gitlab_ee	From 19.1 (inc) to 19.1.2 (exc)

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
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.

Attack-Flow Graph

Impact Analysis

The vulnerability can impact you by allowing an attacker with developer-role permissions to run arbitrary scripts in the browser session of another user. This can lead to theft of sensitive information, session hijacking, or unauthorized actions performed on behalf of the victim user.

Executive Summary

This vulnerability in GitLab EE affects versions from 13.11 before 18.11.7, 19.0 before 19.0.4, and 19.1 before 19.1.2. It allows an authenticated user with developer-role permissions to execute arbitrary scripts in another user's browser session. This happens due to improper sanitization of user-supplied input, which can lead to cross-site scripting (XSS) attacks.

Mitigation Strategies

To mitigate this vulnerability, you should upgrade GitLab EE to a fixed version. Specifically, update to version 18.11.7 or later if you are on the 18.11 branch, 19.0.4 or later if on the 19.0 branch, or 19.1.2 or later if on the 19.1 branch.

This vulnerability affects versions from 13.11 before 18.11.7, 19.0 before 19.0.4, and 19.1 before 19.1.2, and it allows an authenticated user with developer-role permissions to execute arbitrary scripts in another user's browser session due to improper sanitization of user-supplied input.

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