Arbitrary Script Execution and User Session Vulnerability in GitLab
CVE-2026-6896

8.7HIGH

Key Information:

Vendor

Gitlab
Status
Gitlab
Vendor
CVE Published:
8 July 2026

What is CVE-2026-6896?

An issue in GitLab EE allows an authenticated user with developer-role permissions to execute arbitrary scripts in another user's browser session due to improper sanitization of user-supplied input. This vulnerability affects multiple versions of GitLab, necessitating prompt patching to safeguard against potential exploits that could compromise user sessions and data security.

Affected Version(s)

GitLab 13.11 < 18.11.7

GitLab 19.0 < 19.0.4

GitLab 19.1 < 19.1.2

References

https://gitlab.com/gitlab-org/gitlab/-/work_items/597887
https://hackerone.com/reports/3682085
technical-descriptionexploitpermissions-required
https://docs.gitlab.com/releases/patches/patch-release-gi...

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