VulnerabilityAnalyzed
CVE-2026-53667
In versions 7.11.0 through 7.17.0, the RSCErrorHandler is missing protocol validation, allowing for redirects from untrusted sources.
MEDIUM 6.1EPSS 0.20%
Does this matter?
Lower severity and a low EPSS score (0.20%). Track it; it rarely justifies an emergency change on its own.
Description
React Router is a router for React. In versions 7.11.0 through 7.17.0, the RSCErrorHandler is missing protocol validation, allowing for redirects from untrusted sources. This issue is a follow up to CVE-2026-53667, and only affects consuming applications if they are using the unstable RSC APIs. This issue has been fixed in version 7.18.0.
- CVSS 3.1
- 6.1 MEDIUMCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
- EPSS
- 0.20% probability · 10th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-79
- Affected
- shopify/react-router
- Source
- security-advisories@github.com
References
- https://github.com/remix-run/react-router/blob/main/CHANGELOG.md#v7180Release Notes
- https://github.com/remix-run/react-router/commit/ce596e823f0d7b883a433af1d5a839a8b9fe0242Patch
- https://github.com/remix-run/react-router/pull/15177Issue 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-h8fp-f39c-q6mhThird Party Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.