Cross-site scripting in remix-run react-router
Priority LOW 30CWE-79Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- Required
- Attack complexity
- High
- Impact type
- Cross-site scripting
- Confidentiality · integrity · availability
- High · Low · None
- Fix status
- Partial Red Hat: 13 without a fix
Attack profile from CVSS 3.1 · CNA. Fix status from CNA, GitHub and Red Hat. Impact type from CWE-79.
Summary
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.
Why it matters now
Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00355 29th percentileScored 2026-11-07
Fix Partial react-router (remix-run): 7.18.0react-router (npm): 7.18.0Red Hat: 13 without a fix
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- No
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| remix-run | react-router | 7.11.0 to before 7.18.0 | 7.18.0 | Patch available | CNA |
| — | react-router (npm) | 7.11.0 to before 7.18.0 | 7.18.0 | Patch available | GHSA-h8fp-f39c-q6mh |
- react-router Vendorremix-run Affected 7.11.0 to before 7.18.0 Fixed in 7.18.0 Patch available CNA
- react-router (npm) Vendor— Affected 7.11.0 to before 7.18.0 Fixed in 7.18.0 Patch available GHSA-h8fp-f39c-q6mh
Remediation
- Fix · CNA react-router (remix-run) Fixed in 7.18.0
- Fix · GHSA-h8fp-f39c-q6mh react-router (npm) Fixed in 7.18.0 Advisory →
Vendor assessments
Red Hat
Red Hat rating: Moderate. Red Hat's page for this CVE →
| Product | Status | Plan or fix |
|---|---|---|
| Exploit Intelligence | Affected | No fix planned: Out of support scope |
| Network Observability Operator | Affected | No fix yet: Fix deferred |
| OpenShift Lightspeed | Affected | No fix yet: Fix deferred |
| OpenShift Pipelines | Affected | No fix yet: Fix deferred |
| Red Hat Ansible Automation Platform 2 | Affected | No fix yet: Fix deferred |
| Red Hat Data Grid 8 | Affected | No fix planned: Out of support scope |
| Red Hat OpenShift AI (RHOAI) | Affected | No fix yet: Fix deferred |
| Red Hat OpenShift Container Platform 4 | Affected | No fix yet: Fix deferred |
| Red Hat OpenShift Container Platform 5 | Affected | No fix yet: Fix deferred |
| Red Hat Quay 3 | Affected | No fix yet: Fix deferred |
| Red Hat Trusted Profile Analyzer | Affected | No fix yet: Fix deferred |
| Red Hat build of Apicurio Registry 3 | Affected | No fix yet: Fix deferred |
| Secrets Management Console for Red Hat OpenShift | Affected | No fix planned: Out of support scope |
Not affected: 43 products
- Cryostat 4
- Gatekeeper 3
- Migration Toolkit for Applications 8
- Migration Toolkit for Containers
- Migration Toolkit for Virtualization
- Multicluster Engine for Kubernetes
- Network Observability Operator
- Node HealthCheck Operator
- OpenShift Lightspeed
- OpenShift Pipelines
- OpenShift Service Mesh 3
- Red Hat AMQ Broker 7
- Red Hat Advanced Cluster Management for Kubernetes 2
- Red Hat Advanced Cluster Security 4
- Red Hat Ansible Automation Platform 2
- Red Hat Build of Keycloak
- Red Hat Build of Podman Desktop
- Red Hat Ceph Storage 5
- Red Hat Ceph Storage 9
- Red Hat Connectivity Link 1
- Red Hat Developer Hub 1
- Red Hat Discovery 2
- Red Hat Edge Manager 1
- Red Hat Enterprise Linux 10
- Red Hat Enterprise Linux 8
- Red Hat Enterprise Linux 9
- Red Hat Hardened Images
- Red Hat JBoss Enterprise Application Platform 8
- Red Hat JBoss Enterprise Application Platform Expansion Pack
- Red Hat OpenShift AI (RHOAI)
- Red Hat OpenShift Container Platform 4
- Red Hat OpenShift Dev Spaces
- Red Hat OpenShift GitOps
- Red Hat OpenShift Virtualization 4
- Red Hat OpenShift distributed tracing 3
- Red Hat Openshift Data Foundation 4
- Red Hat Satellite 6
- Red Hat Single Sign-On 7
- Red Hat Trusted Artifact Signer
- Red Hat Trusted Profile Analyzer
- Red Hat build of Apache Camel - HawtIO 4
- Red Hat build of Apache Camel for Spring Boot 4
- Self-service automation portal 2
Timeline
- 2026-10-02 Threatist record created from CVE-2026-53667
- 2026-10-03 Alias added: GHSA-h8fp-f39c-q6mh
- 2026-10-27 Affected versions changed · Red Hat
- 2026-10-30 Affected versions changed · Red Hat
References
Patch 2
More remix-run React-router vulnerabilities
- TI-2026-40200 React Router: Unauthenticated Denial of Service via Inefficient Route Matching CVSS 4.0HIGH 8.7
- TI-2026-30645 React Router vulnerable to DoS via unbounded path expansion in __manifest endpoint CVSS 3.1HIGH 7.5
- TI-2026-26400 React Router vulnerable to Denial of Service via reflected user input in single-fetch CVSS 3.1HIGH 7.5
- TI-2026-17723 React Router vulnerable to XSS via Open Redirects CVSS 3.1HIGH 8.0
- TI-2026-17585 React Router SSR XSS in ScrollRestoration CVSS 3.1HIGH 8.2
- TI-2026-30532 Deserialization of untrusted data in remix-run react-router CVSS 3.1HIGH 8.1
Sources
- CVE-2026-53667 · CVE Program
- CVE-2026-53667 · NVD
- FIRST EPSS
- GHSA-h8fp-f39c-q6mh · GitHub Advisory Database · CC BY 4.0
- CVE-2026-53667 · Red Hat security data · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences