CVE-2026-3857
Received Received - Intake
CSRF Vulnerability in GitLab Allows Unauthorized GraphQL Mutation Execution

Publication date: 2026-03-25

Last updated on: 2026-03-30

Assigner: GitLab Inc.

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.
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Meta Information
Published
2026-03-25
Last Modified
2026-03-30
Generated
2026-06-16
AI Q&A
2026-03-25
EPSS Evaluated
2026-06-15
NVD
CVE-2026-3857
EUVD
EUVD-2026-15935
Affected Vendors & Products
Showing 6 associated CPEs
Vendor Product Version / Range
gitlab gitlab From 18.9.0 (inc) to 18.9.3 (exc)
gitlab gitlab 18.10.0
gitlab gitlab From 18.9.0 (inc) to 18.9.3 (exc)
gitlab gitlab 18.10.0
gitlab gitlab From 17.10.0 (inc) to 18.8.7 (exc)
gitlab gitlab From 17.10.0 (inc) to 18.8.7 (exc)
Helpful Resources
Exploitability
CWE
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KEV
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CWE ID Description
CWE-352 The web application does not, or cannot, sufficiently verify whether a request was intentionally provided by the user who sent the request, which could have originated from an unauthorized actor.
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Executive Summary

This vulnerability in GitLab CE/EE versions before certain fixed releases allows an unauthenticated user to execute arbitrary GraphQL mutations on behalf of authenticated users. The root cause is insufficient Cross-Site Request Forgery (CSRF) protection, which means that attackers can trick authenticated users into performing unintended actions without their consent.

Impact Analysis

The impact of this vulnerability is high because an attacker can perform actions with the privileges of authenticated users without their knowledge. This can lead to unauthorized changes, data manipulation, or other harmful operations within GitLab, potentially compromising the integrity and confidentiality of your projects and data.

Mitigation Strategies

To mitigate this vulnerability, you should upgrade GitLab CE/EE to a fixed version. Specifically, update to version 18.8.7 or later if you are using the 17.10 to 18.8 series, version 18.9.3 or later if you are using the 18.9 series, or version 18.10.1 or later if you are using the 18.10 series.

These updates address the insufficient CSRF protection that allowed unauthenticated users to execute arbitrary GraphQL mutations on behalf of authenticated users.

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