CVE-2026-3857 Cross-Site Request Forgery (CSRF) in GitLab
An unauthenticated attacker can execute arbitrary GraphQL mutations on behalf of authenticated users due to insufficient CSRF protection in GitLab.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- Available
What is CVE-2026-3857?
CVE-2026-3857 is a high-severity vulnerability in Gitlab Gitlab, published on 25 Mar 2026. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
Official description
GitLab has remediated an issue in GitLab CE/EE affecting all versions from 17.10 before 18.8.7, 18.9 before 18.9.3, and 18.10 before 18.10.1 that could have allowed an unauthenticated user to execute arbitrary GraphQL mutations on behalf of authenticated users due to insufficient CSRF protection.
Weakness: CWE-352
Which versions are affected by CVE-2026-3857?
1 open source package ship an affected version, including gitlab. It affects 1 product.
| Package | Affected | Fixed in |
|---|---|---|
gitlab Bitnami | From 17.10.0 | 18.8.7, 18.9.3, 18.10.1 |
Products include Gitlab Gitlab.
How do I fix CVE-2026-3857?
Upgrade gitlab to a fixed version for your release line: 18.8.7, 18.9.3 or 18.10.1.
Is CVE-2026-3857 being exploited?
There is no known exploitation of CVE-2026-3857 in the wild and no public exploit code.
Other vulnerabilities in Gitlab Gitlab
- CVE-2026-97229 GitLab Community Edition and Enterprise Edition Integer Overflow or Wraparound
- CVE-2026-85706 GitLab Community Edition and Enterprise Edition Path Traversal
- CVE-2023-7028 GitLab Community and Enterprise Editions Improper Access Control
- CVE-2021-22205 GitLab Community and Enterprise Editions Remote Code Execution
- CVE-2021-39935 GitLab Community and Enterprise Editions Server-Side Request Forgery (SSRF)
Sources
Also known as BIT-gitlab-2026-3857, GHSA-hv8g-9cgr-4hmc.