High severity · published Apr 22, 2026
CVE-2026-5816
Improper Resolution of Path Equivalence in GitLab
8.1
CVSS
0.4%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
Required
Confidentiality
High
Integrity
High
Availability
None
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.4% · higher than 35% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
GI
GitLab · GitLab
18.10 before 18.10.4; 18.11 before 18.11.1 · source: vendor, NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-5816
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-5816
Release Notes
https://about.gitlab.com/releases/2026/04/22/patch-release-gitlab-18-11-1-released/
Broken Link
https://gitlab.com/gitlab-org/gitlab/-/work_items/592816
Permissions Required
https://hackerone.com/reports/3572231
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