CSRF Vulnerability in GitLab CE/EE Affects Multiple Versions
CVE-2026-3857

8.1HIGH

Key Information:

Vendor

Gitlab
Status
Gitlab
Vendor
CVE Published:
25 March 2026

What is CVE-2026-3857?

A vulnerability in GitLab CE/EE versions prior to 18.8.7, 18.9.3, and 18.10.1 potentially allows unauthenticated users to perform unauthorized GraphQL mutations on behalf of authenticated users due to inadequate CSRF protections. This could lead to significant security risks as sensitive actions might be executed without proper validation, exposing user accounts and data to exploitation. For enhanced security, users are advised to upgrade to the patched versions as soon as possible.

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Deploy the Patch

Affected Version(s)

GitLab 17.10 < 18.8.7

GitLab 18.9 < 18.9.3

GitLab 18.10 < 18.10.1

References

https://gitlab.com/gitlab-org/gitlab/-/work_items/592828
https://hackerone.com/reports/3584382
technical-descriptionexploitpermissions-required
https://about.gitlab.com/releases/2026/03/25/patch-releas...

CVSS V3.1

Score:
8.1
Severity:
HIGH
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
Required
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

Thanks [ahacker1](https://hackerone.com/ahacker1) for reporting this vulnerability through our HackerOne bug bounty program
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