CVE-2026-5816

GitLab has remediated an issue in GitLab CE/EE affecting all versions from 18.10 before 18.10.4 and 18.11 before 18.11.1 that could have allowed an unauthenticated user to execute arbitrary JavaScript in a user's browser session due to improper path validation under certain conditions.

CVSS v3 8.0 HIGH

8.0^/10

CVSS v3 : HIGH

Vector :

Exploitability : 1.6 / Impact : 5.8

Attack Vector NETWORK

Attack Complexity HIGH

Privileges Required NONE

User Interaction REQUIRED

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact NONE

Scope CHANGED

References

Link	Resource
https://about.gitlab.com/releases/2026/04/22/patch-release-gitlab-18-11-1-released/	Release Notes Vendor Advisory
https://gitlab.com/gitlab-org/gitlab/-/work_items/592816	Broken Link
https://hackerone.com/reports/3572231	Permissions Required

Configurations

Configuration 1 (hide)

OR	cpe:2.3:a:gitlab:gitlab:::::community:::*
	cpe:2.3:a:gitlab:gitlab:::::enterprise:::*
	cpe:2.3:a:gitlab:gitlab:18.11.0::::community:::
	cpe:2.3:a:gitlab:gitlab:18.11.0::::enterprise:::

History

23 Apr 2026, 20:30

Type	Values Removed	Values Added
CPE		cpe:2.3:a:gitlab:gitlab:::::enterprise:::* cpe:2.3:a:gitlab:gitlab:18.11.0::::enterprise::: cpe:2.3:a:gitlab:gitlab:::::community:::* cpe:2.3:a:gitlab:gitlab:18.11.0::::community:::
First Time		Gitlab Gitlab gitlab
References	~~() https://about.gitlab.com/releases/2026/04/22/patch-release-gitlab-18-11-1-released/ -~~	() https://about.gitlab.com/releases/2026/04/22/patch-release-gitlab-18-11-1-released/ - Release Notes, Vendor Advisory
References	~~() https://gitlab.com/gitlab-org/gitlab/-/work_items/592816 -~~	() https://gitlab.com/gitlab-org/gitlab/-/work_items/592816 - Broken Link
References	~~() https://hackerone.com/reports/3572231 -~~	() https://hackerone.com/reports/3572231 - Permissions Required

22 Apr 2026, 17:16

Type	Values Removed	Values Added
New CVE

Information

Published : 2026-04-22 17:16

Updated : 2026-04-23 20:30

NVD link : CVE-2026-5816

Mitre link : CVE-2026-5816

CVE.ORG link : CVE-2026-5816

JSON object : View

Products Affected

gitlab

gitlab

CWE

CWE-41

Improper Resolution of Path Equivalence

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