Skip to main content
Public proof of conceptFix available

CVE-2025-43864

A public proof of concept exists; no exploitation attested.

  • Published2025-04-25
  • Fixed in7.5.2
  • WeaknessCWE-755

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

Description

React Router is a router for React. Starting in version 7.2.0 and prior to version 7.5.2, it is possible to force an application to switch to SPA mode by adding a header to the request. If the application uses SSR and is forced to switch to SPA, this causes an error that completely corrupts the page. If a cache system is in place, this allows the response containing the error to be cached, resulting in a cache poisoning that strongly impacts the availability of the application. This issue has been patched in version 7.5.2.

Timeline

dates in UTC
  1. 2025-04-2501:15CVE publishedNVD

Versions per branch

OSV
react-router
BranchAffectedFixed in
7.x≥ 7.2.0, < 7.5.27.5.2

as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.

Products declared by the CNA1 product

As GitHub_M, the CNA that assigned this CVE, declared them in the CVE record; versions as written.

  • remix-run react-router
    Affected
    • = >= 7.2.0, < 7.5.2no fix stated

Source: the CNA record (CVE Program), © The MITRE Corporation,CVE Terms of UseCVE recordupdated 2025-04-25

Distribution builds and vendor advisories

Packages from OSV.dev and products from the vendors' CSAF advisories.

version not verifiedVersions not verified: read as OSV.dev and the vendors publish them, not checked against each vendor's release list.

Packages

  • react-routerTuxCare:npmfrom 7.5.1-tuxcare.0 · fixed in 7.5.1-tuxcare.1and 10 other packages

Vendor advisories

  • CVE-2025-43864 Red Hat Product Security

    react-router: React Router allows a DoS via cache poisoning by forcing SPA mode

Full record on NVD

Fix

  1. Update react-router to 7.5.2

Detection

read 2026-11-01 01:02 UTC
Nuclei template
none so far
ProjectDiscovery
Exploit-DB
no entry
Exploit-DB
Proof of concept
Metasploit modules
none listed
Metasploit Framework

Sources

Identifiers

Technical details

CVSS v3 Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Published
2025-04-25
Last Modified
2026-06-17
NVD status
Deferred
GitHub Advisory
GHSA-f46r-rw29-r322

Frequently asked questions

What is CVE-2025-43864?

React Router is a router for React. Starting in version 7.2.0 and prior to version 7.5.2, it is possible to force an application to switch to SPA mode by adding a header to the request. If the application uses SSR and is forced to switch to SPA, this causes an error that completely corrupts the page. If a cache system is in place, this allows the response containing the error to be cached, resulting in a cache poisoning that strongly impacts the availability of the application. This issue has been patched in version 7.5.2.

Is CVE-2025-43864 actively exploited?

A proof-of-concept exploit exists for CVE-2025-43864, but active exploitation has not been confirmed at this time.

What is the CVSS score for CVE-2025-43864?

CVE-2025-43864 has a CVSS v3 base score of 7.5 (HIGH severity), with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.

Running react-router? Hear about its next vulnerability

Surveillance reads the versions in your stack — a domain, a lockfile or a list — checks each CVE against the ranges its sources publish, and alerts you when one you run is exploited or enters CISA KEV. A version it cannot read stays « version not verified ».

Get alerts for this productCISA KEV additions, November 2026Search CVEs

No credit card required · No monthly cap on website lookups · 250 API requests/month

Go further

Related vulnerabilities

Same product first, then the same vendor advisory and the same publication week.

Back to CVE Database

Sources for this record