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CVE-2026-5816 Details

Description

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.

Metrics

CVSS 3.x Severity and Vector Strings:

NIST: [email protected]CVSS-B:8.1 HIGHVector:CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N

CNA: [email protected]CVSS-B:8 HIGHVector:CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:H/I:H/A:N

References to Advisories, Solutions, and Tools

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URL	Source(s)	Tag(s)
https://about.gitlab.com/releases/2026/04/22/patch-release-gitlab-18-11-1-released/	[email protected]	Release NotesVendor Advisory
https://gitlab.com/gitlab-org/gitlab/-/work_items/592816	[email protected]	Broken Link
https://hackerone.com/reports/3572231	[email protected]	Permissions Required

Weakness Enumeration

CWE-ID	CWE Name	Source
CWE-41	Improper Resolution of Path Equivalence	[email protected]

Affected Products

Product	Versions
gitlab gitlab	>= 18.10.0, < 18.10.4 18.11.0
CPE 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::: Remediation No remediation found in references.

Change History

4 change records found show changes

Date	Action	Recorded By
Jun 17, 2026	CVE Modified	[email protected]
Jun 17, 2026	CVE Modified	CISA-ADP
Apr 23, 2026	Initial Analysis	[email protected]
Apr 22, 2026	New CVE Received	[email protected]