Is there a public exploit for CVE-2025-59057?

Yes. Proof-of-concept code for CVE-2025-59057 has been published publicly.

Is there a proof of concept for CVE-2025-59057?

Yes — 1 proof-of-concept entry is linked on this page, from public repositories and community submissions. They are listed for authorised testing only.

How severe is CVE-2025-59057?

CVE-2025-59057 scores CVSS 7.6 (v3.1), rated high. EPSS puts the chance of exploitation in the next 30 days at 0.5%.

What does CVE-2025-59057 affect?

CVE-2025-59057 affects remix-run react-router, @remix-run/react.

7.6 High

React Router is a router for React.

CVE-2025-59057

React Router is a router for React. In @remix-run/react versions 1.15.0 through 2.17.0. and react-router versions 7.0.0 through 7.8.2, a XSS vulnerability exists in in React Router's meta()/ APIs in Framework Mode when generating script:ld+json tags which could allow arbitrary JavaScript execution during SSR if untrusted content is used to generate the tag. There is no impact if the application is being used in Declarative Mode ( ) or Data Mode (createBrowserRouter/ ). This issue has been patched in @remix-run/react version 2.17.1 and react-router version 7.9.0.

Proof-of-concept code is published

Public PoC

Public PoCboroeurnprach/CVE-2025-59057-PoC

Signals come from Exploit-DB, Metasploit, Nuclei and published proof-of-concept repositories. Their absence means nothing was found, not that nothing exists.

Assessment

CVSS: 7.6 (v3.1)
Severity: High
EPSS: 0.5% chance of exploitation in the next 30 days
Known exploited: Not listed in CISA KEV
Exploit availability: Public PoC
Published: 8 January 2026
Last updated: 8 September 2026
Affected: remix-run · react-router · react-router · @remix-run/react
Weakness: CWE-79
Assigner: security-advisories@github.com

CVSS vectorCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:L/A:N

At the source

References

Community proofs of concept

No community proof of concept yet. If you have one for a published vulnerability and the right to share it, add it below — it will appear here once reviewed.

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Query this programmatically

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