CVE-2026-6821

GitLab has remediated an issue in GitLab EE affecting all versions from 18.8 before 18.10.7, 18.11 before 18.11.4, and 19.0 before 19.0.1. Under certain conditions, an authenticated user could have caused specific Duo AI workflows to run under another user's identity due to improper user identity resolution.

GitLab has remediated an issue in GitLab EE affecting all versions from 16.4 before 18.9.7, 18.10 before 18.10.6, and 18.11 before 18.11.3. This issue could have allowed an authenticated user with developer-role permissions to execute arbitrary JavaScript in other users' browsers due to improper input sanitization.

GitLab has remediated an issue in GitLab EE affecting all versions from 18.7 before 18.9.7, 18.10 before 18.10.6, and 18.11 before 18.11.3. In customizable analytics dashboards, an authenticated user could have executed arbitrary JavaScript in the context of other users' browsers due to improper input sanitization.

GitLab has remediated an issue in GitLab EE affecting all versions from 18.7 before 18.9.7, 18.10 before 18.10.6, and 18.11 before 18.11.3. This issue could have allowed an authenticated user to execute arbitrary JavaScript in other users' browsers due to improper input sanitization.

GitLab EE versions from 13.6 before 19.2.8, 19.3 before 19.3.5, and 19.4 before 19.4.2 have a vulnerability that, under certain conditions, could allow an authenticated user with limited permissions to modify CI/CD deployment rollback settings without authorization, due to insufficient access control checks.

A vulnerability in GitLab EE could, under certain conditions, allow an authenticated user to inject specially crafted content into AI agent instructions, potentially causing unintended command execution attributed to other users. Affects versions from 19.1 before 19.2.8, 19.3 before 19.3.5, and 19.4 before 19.4.2.

GitLab EE versions from 16.11 before 19.2.8, 19.3 before 19.3.5, and 19.4 before 19.4.2 have a fixed issue that, under certain conditions, could allow an authenticated user to approve a merge request despite having contributed commits to it, due to improper identity resolution.

A vulnerability in GitLab EE could, under certain conditions, allow an authenticated user to execute arbitrary CI/CD pipelines in a transferred project with the new group's privileges. Affects versions from 18.1 before 19.2.8, 19.3 before 19.3.5, and 19.4 before 19.4.2.

GitLab EE contains an improper authorization check that, under certain conditions, could allow an authenticated user with developer-role permissions to bypass admin-configured AI tool governance controls for workflows in namespaces they do not control. Affected versions are from 19.1 before 19.2.7, 19.3 before 19.3.3, and 19.4 before 19.4.1.

GitLab EE versions from 18.7 before 19.2.7, 19.3 before 19.3.3, and 19.4 before 19.4.1 have a vulnerability that under certain conditions could allow an authenticated user to access sensitive CI/CD variable values from debug-mode job traces through the Duo AI troubleshooting feature due to missing authorization checks.