AIKIDO-2026-274519
react-router is vulnerable to Cross-Site Request Forgery (CSRF)
59
Medium Risk
This Affects:
react-routerTL;DR
React Router Framework Mode compares the Origin header to a host derived from x-forwarded-host or Host when validating action requests. An attacker who can supply a matching forwarded host value alongside a cross-site origin can satisfy the check and submit forged mutations. The patch derives the comparison host from new URL(request.url).host instead of forwarded headers.
Who does this affect?
You are affected if you are using a version that falls within the vulnerable range and running Framework Mode server actions where untrusted clients can influence forwarded host headers or request URL construction.
Background info
react-router is vulnerable to Cross-Site Request Forgery (CSRF) in versions 7.12.0 - 7.17.0.
How to fix this
Upgrade the react-router and/or the react-router-dom library to the patch version.
Are You Affected?
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SOC 2Compliant
ISO 27001Compliant