CVE-2026-55685React Router is a router for React.
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No exploitation reported and no EPSS estimate yet.
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React Router is a router for React. In versions 7.0.0 through 7.17.0, the manifest endpoint could be accessed via unauthenticated targeted requests that would put heavy load on the server and slow down response times. This issue is a follow up to CVE-2026-42342, and does not does not impact React Router applications using Declarative Mode (<BrowserRouter>) or Data Mode (createBrowserRouter/<RouterProvider>). This issue has been fixed in version 7.18.0.
- CVSS
- 7.5 HIGH (v3.1, NVD)CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- Weakness (CWE)
- CWE-400, CWE-407
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- Not given
- NVD analysis
- Analyzed
- Record last updated
- Aug 3, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
shopify react-router shopify:react-router | from 7.0.0 before 7.18.0 | NVD |
References
- https://github.com/remix-run/react-router/blob/main/CHANGELOG.md#v7180release-notes
- https://github.com/remix-run/react-router/commit/09e6020d1950e54f361f7ad00938ecd4dde60929patch
- https://github.com/remix-run/react-router/pull/15186issue-tracking, patch
- https://github.com/remix-run/react-router/releases/tag/react-router@7.18.0release-notes
- https://github.com/remix-run/react-router/security/advisories/GHSA-8x6r-g9mw-2r78third-party-advisory
- https://github.com/remix-run/react-router/security/advisories/GHSA-chx6-hx7r-mcp5third-party-advisory
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.