GitLab CE/EE CSRF Enables Arbitrary GraphQL Mutations (v17.1018.10)
CVE-2026-3857 Published on March 25, 2026
Cross-Site Request Forgery (CSRF) in GitLab
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.
Vulnerability Analysis
CVE-2026-3857 can be exploited with network access, requires user interaction. This vulnerability is considered to have a low attack complexity. The potential impact of an exploit of this vulnerability is considered to have a high impact on confidentiality and integrity, and no impact on availability.
Weakness Type
What is a Session Riding Vulnerability?
The web application does not, or can not, sufficiently verify whether a well-formed, valid, consistent request was intentionally provided by the user who submitted the request. When a web server is designed to receive a request from a client without any mechanism for verifying that it was intentionally sent, then it might be possible for an attacker to trick a client into making an unintentional request to the web server which will be treated as an authentic request. This can be done via a URL, image load, XMLHttpRequest, etc. and can result in exposure of data or unintended code execution.
CVE-2026-3857 has been classified to as a Session Riding vulnerability or weakness.
Products Associated with CVE-2026-3857
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Affected Versions
GitLab:- Version 17.10 and below 18.8.7 is affected.
- Version 18.9 and below 18.9.3 is affected.
- Version 18.10 and below 18.10.1 is affected.
Exploit Probability
EPSS (Exploit Prediction Scoring System) scores estimate the probability that a vulnerability will be exploited in the wild within the next 30 days. The percentile shows you how this score compares to all other vulnerabilities.