Is there a public exploit for CVE-2026-55685?

No public exploit for CVE-2026-55685 was found in Exploit-DB, Metasploit, Nuclei templates or public proof-of-concept repositories. That is an absence of evidence rather than proof that none exists.

How severe is CVE-2026-55685?

CVE-2026-55685 scores CVSS 8.7 (v4.0), rated high. EPSS puts the chance of exploitation in the next 30 days at 0.71%.

What does CVE-2026-55685 affect?

CVE-2026-55685 affects remix-run react-router.

8.7 High

React Router is a router for React.

CVE-2026-55685

This is a follow up to https://github.com/remix-run/react-router/security/advisories/GHSA-8x6r-g9mw-2r78 that covers additional reported scenarios in which the manifest endpoint could be accessed via unauthenticated targeted requests that would put heavy load on the server and slow down response times. [!NOTE] This only impacts Framework Mode applications. This does not impact your application if you are using Declarative or Data Mode.

Assessment

CVSS: 8.7 (v4.0)
Severity: High
EPSS: 0.71% chance of exploitation in the next 30 days
Known exploited: Not listed in CISA KEV
Exploit availability: Nothing found in Exploit-DB, Metasploit, Nuclei or public PoC repositories
Published: 24 July 2026
Last updated: 24 October 2026
Affected: remix-run · react-router · react-router
Weakness: CWE-400, CWE-407
Assigner: security-advisories@github.com

CVSS vectorCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N

At the source

References

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