CVE-2025-43865
React Router allows pre-render data spoofing on React-Router framework mode
At a glance
- Severity
- HIGH 8.2
- EPSS
- EPSS 0.81 % · percentile 57 (2026-10-27)
- State
- PUBLISHED
- Published
- Updated
- Assigner
- GitHub_M
- NVD status
- Deferred
Description
React Router is a router for React. In versions on the 7.0 branch prior to version 7.5.2, it's possible to modify pre-rendered data by adding a header to the request. This allows to completely spoof its contents and modify all the values of the data object passed to the HTML. This issue has been patched in version 7.5.2.
Scores
| Version | Score | Vector | Scored by |
|---|---|---|---|
| CVSS 3.1 | HIGH 8.2 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:H | GitHub_M |
| CVSS 3.1 | HIGH 8.2 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:H | NVD · security-advisories@github.com (Secondary) |
Weaknesses (CWE)
Advisories
- GHSA-cpj6-fhp6-mr6j — React Router allows pre-render data spoofing on React-Router framework mode
European references
- ENISA EUVD · EUVD-2025-11979
- GCVE · GCVE-0-2025-43865
CERT-FR advisories
- CERTFR-2026-AVI-0054 — Multiples vulnérabilités dans Centreon Infra Monitoring · cert.ssi.gouv.fr
- CERTFR-2025-AVI-1127 — Multiples vulnérabilités dans Centreon Web · cert.ssi.gouv.fr
Affected products
| Product | Versions |
|---|---|
| remix-run · react-router | affected >= 7.0, < 7.5.2 |
References
- https://github.com/remix-run/react-router/security/advisories/GHSA-cpj6-fhp6-mr6j
- https://github.com/remix-run/react-router/commit/c84302972a152d851cf5dd859ff332b354b70111
- https://github.com/remix-run/react-router/blob/e6c53a0130559b4a9bd47f9cf76ea5b08a69868a/packages/react-router/lib/server-runtime/routes.ts#L87
Sources
| Source | Licence |
|---|---|
| CVE List (CVEProject cvelistV5) | CVE Program Terms of Use |
| EPSS (FIRST.org) | FIRST — attribution requested |
| ENISA EUVD | ENISA — reproduction authorised, source acknowledged |
| CERT-FR (ANSSI) | Licence Ouverte / Etalab 2.0 |
| NVD (NIST) via fkie-cad/nvd-json-data-feeds | Public domain — this product uses data from the NVD API but is not endorsed or certified by the NVD |