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.
Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).
| Vendor | Product | Default status | Versions | ||||||
|---|---|---|---|---|---|---|---|---|---|
| remix-run | react-router | affected |
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Project Subscriptions
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Advisories
| Source | ID | Title |
|---|---|---|
 Github GHSA |
GHSA-h8fp-f39c-q6mh | React Router: RSCErrorHandler Missing Protocol Validation (XSS) |
Fixes
Solution
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Workaround
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References
History
Mon, 27 Jul 2026 23:30:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| 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. | |
| Title | React Router: Cross-site Scripting is Possible due to Missing RSCErrorHandler Protocol Validation (Incomplete fix for CVE-2026-53667) | |
| Weaknesses | CWE-79 | |
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| Metrics |
cvssV3_1
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Projects
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MITRE
Status: PUBLISHED
Assigner: GitHub_M
Published:
Updated: 2026-07-27T21:21:16.084Z
Reserved: 2026-06-09T20:50:36.877Z
Link: CVE-2026-53667
Vulnrichment
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NVD
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Redhat
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OpenCVE Enrichment
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Weaknesses