CSRF Vulnerability in React Router by Remix-run
CVE-2026-22030

6.5MEDIUM

Key Information:

Vendor

Remix-run

Status
React-router
Vendor
CVE Published:
10 January 2026

What is CVE-2026-22030?

A Cross-Site Request Forgery (CSRF) vulnerability has been identified in React Router, specifically affecting versions of @remix-run/server-runtime prior to 2.17.3 and react-router between versions 7.0.0 and 7.11.0. This vulnerability allows attackers to execute unauthorized actions on behalf of authenticated users when document POST requests are directed to UI routes. The issue arises when leveraging server-side route action handlers in Framework Mode or React Server Actions in the new unstable RSC mode. It is important to note that there is no risk when using Declarative Mode or Data Mode configurations. Users are strongly encouraged to upgrade to the patched versions for enhanced security.

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Deploy the Patch

Affected Version(s)

react-router @remix-run/router < 2.17.3 < @remix-run/router 2.17.3

react-router react-router >= 7.0.0, < 7.12.0 < react-router 7.0.0, 7.12.0

References

https://github.com/remix-run/react-router/security/adviso...
x_refsource_CONFIRM

CVSS V3.1

Score:
6.5
Severity:
MEDIUM
Confidentiality:
None
Integrity:
High
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
Required
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

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