Is react-router affected by CVE-2026-40181?

npm react-router is affected in >=7.0.0 =6.7.0 <6.30.4.

Is CVE-2026-40181 being exploited?

Not on the CISA KEV list. EPSS exploit probability is 0.2%.

medium

CVE-2026-40181

Q: Is CVE-2026-40181 being exploited?

Not on the CISA KEV list. EPSS exploit probability is 0.2%.

npm · react-router

Summary

React Router's same-origin redirect with path starting // causes open redirect via protocol-relative URL reinterpretation

Severity: medium
EPSS: 0.2% (p11)
Also known as: GHSA-2j2x-hqr9-3h42
Published: 2026-06-03

References

Related advisories

GHSA-qwww-vcr4-c8h2 — high · npm/react-router
CVE-2026-55685 — high · npm/react-router
CVE-2026-34077 — high · npm/react-router
CVE-2026-42342 — high · npm/react-router
CVE-2026-42211 — high · npm/react-router
CVE-2026-33245 — high · npm/react-router
CVE-2026-53669 — medium · npm/react-router
CVE-2026-53667 — medium · npm/react-router

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Sources: CISA KEV (public domain), OSV.dev & GitHub Advisory Database (CC-BY-4.0), FIRST EPSS, NVD/CWE (public domain). Served live from the Stateward advisory database.