Input Sanitization Flaw in GitLab EE Affects Multiple Versions
CVE-2026-6073

8.7HIGH

Key Information:

Vendor

Gitlab
Status
Gitlab
Vendor
CVE Published:
14 May 2026

What is CVE-2026-6073?

GitLab’s EE has addressed a significant input sanitization issue that permitted authenticated users to potentially execute arbitrary JavaScript in the browsers of other users. This vulnerability affects various versions of GitLab EE, specifically from 18.7 versions prior to 18.9.7, 18.10 versions prior to 18.10.6, and 18.11 versions prior to 18.11.3. Proper input validation measures were lacking, which could allow malicious actors with authenticated access to exploit the flaw and manipulate user sessions, leading to possible unauthorized actions within the platform.

Affected Version(s)

GitLab 18.7 < 18.9.7

GitLab 18.10 < 18.10.6

GitLab 18.11 < 18.11.3

References

https://gitlab.com/gitlab-org/gitlab/-/work_items/596340
https://hackerone.com/reports/3655677
technical-descriptionexploitpermissions-required
https://about.gitlab.com/releases/2026/05/13/patch-releas...

CVSS V3.1

Score:
8.7
Severity:
HIGH
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
Low
User Interaction:
Required
Scope:
Changed

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

Thanks [joaxcar](https://hackerone.com/joaxcar) for reporting this vulnerability through our HackerOne bug bounty program
.