React Router vulnerable to XSS in unstable RSC redirect handling via javascript: redirect targets
Priority LOW 34CWE-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 · High · None
- Fix status
- Partial Red Hat: 5 fixed, 33 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 7.7.0 through 7.13.1, when using React Router's unstable React Server Components (RSC) APIs, there is a potential client-side Cross-Site Scripting (XSS) vulnerability in the RSC redirect handling if redirects come from untrusted sources. This does not impact applications that are not using the unstable RSC APIs in React Router. This is patched in version 7.13.2.
Why it matters now
Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00189 8th percentileScored 2026-11-07
Fix Partial react-router (remix-run): 7.13.2react-router (npm): 7.13.2Red Hat: 8 advisoriesRed Hat: 5 fixed, 33 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 | 7.7.0 to before 7.13.2 | 7.13.2 | Patch available | CNA |
| — | react-router (npm) | 7.7.0 to before 7.13.2 | 7.13.2 | Patch available | GHSA-8646-j5j9-6r62 |
- react-router Vendorremix-run Affected 7.7.0 to before 7.13.2 Fixed in 7.13.2 Patch available CNA
- react-router (npm) Vendor— Affected 7.7.0 to before 7.13.2 Fixed in 7.13.2 Patch available GHSA-8646-j5j9-6r62
Remediation
- Fix · CNA react-router (remix-run) Fixed in 7.13.2
- Fix · GHSA-8646-j5j9-6r62 react-router (npm) Fixed in 7.13.2 Advisory →
Red Hat 8 advisories
- RHSA-2026:92136 Released 2026-10-28 · Red Hat rating ImportantA Subscription Management tool for finding and reporting Red Hat product usage
- Red Hat Discovery 2 registry.redhat.io/discovery/discovery-server-rhel9, registry.redhat.io/discovery/discovery-ui-rhel9
- RHSA-2026:91967 Released 2026-10-28 · Red Hat rating ImportantA Subscription Management tool for finding and reporting Red Hat product usage
- Red Hat Discovery 2 registry.redhat.io/discovery/discovery-server-rhel9, registry.redhat.io/discovery/discovery-ui-rhel9
- RHSA-2026:73987 Released 2026-09-30 · Red Hat rating CriticalRHOAI 3.3.7 - Red Hat OpenShift AI
- Red Hat OpenShift AI 3.3 registry.redhat.io/rhoai/odh-built-in-detector-rhel9, registry.redhat.io/rhoai/odh-dashboard-rhel9, registry.redhat.io/rhoai/odh-data-science-pipelines-argo-argoexec-rhel9 +47
Show 5 more Red Hat advisories
- RHSA-2026:60520 Released 2026-08-27 · Red Hat rating CriticalRHOAI 3.4.4 - Red Hat OpenShift AI
- Red Hat OpenShift AI 3.4 registry.redhat.io/rhoai/odh-automl-rhel9, registry.redhat.io/rhoai/odh-autorag-rhel9, registry.redhat.io/rhoai/odh-built-in-detector-rhel9 +47
- RHSA-2026:48124 Released 2026-07-29 · Red Hat rating ImportantRed Hat OpenShift Dev Spaces 3.29.1 Release.
- Red Hat OpenShift Dev Spaces 3.29 registry.redhat.io/devspaces/code-rhel9, registry.redhat.io/devspaces/dashboard-rhel9, registry.redhat.io/devspaces/jetbrains-ide-rhel9 +2
- RHSA-2026:41951 Released 2026-07-20 · Red Hat rating ImportantRed Hat Data Grid 8.6.2 security update
- Red Hat Data Grid 8.6.2
- RHSA-2026:37275 Released 2026-07-09 · Red Hat rating CriticalRHOAI 3.3.5 - Red Hat OpenShift AI
- Red Hat OpenShift AI 3.3 registry.redhat.io/rhoai/odh-dashboard-rhel9, registry.redhat.io/rhoai/odh-data-science-pipelines-operator-controller-rhel9, registry.redhat.io/rhoai/odh-feast-operator-rhel9 +45
- RHSA-2026:34456 Released 2026-07-01 · Red Hat rating CriticalRHOAI 3.4.2 - Red Hat OpenShift AI
- Red Hat OpenShift AI 3.4 registry.redhat.io/rhoai/odh-kserve-storage-initializer-rhel9, registry.redhat.io/rhoai/odh-llama-stack-core-rhel9, registry.redhat.io/rhoai/odh-mlserver-rhel9 +33
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 yet |
| Migration Toolkit for Applications 8 | Affected | No fix yet |
| Migration Toolkit for Containers | Affected | No fix yet |
| Migration Toolkit for Virtualization | Affected | No fix planned: Will not fix |
| Network Observability Operator | Affected | No fix yet |
| Node HealthCheck Operator | Affected | No fix yet |
| OpenShift Lightspeed | Affected | No fix yet |
| OpenShift Pipelines | Affected | No fix yet |
| OpenShift Service Mesh 2 | Affected | No fix yet |
| Red Hat Advanced Cluster Management for Kubernetes 2 | Affected | No fix yet |
| Red Hat Ansible Automation Platform 2 | Affected | No fix yet |
| Red Hat Build of Keycloak | Affected | No fix yet |
| Red Hat Build of Podman Desktop | Affected | No fix yet |
| Red Hat Ceph Storage 5 | Affected | No fix yet |
| Red Hat Ceph Storage 9 | Affected | No fix yet |
| Red Hat Edge Manager 1 | Affected | No fix planned: Will not fix |
| Red Hat Enterprise Linux 8 | Affected | No fix yet |
| Red Hat Fuse 7 | Affected | No fix yet |
| Red Hat OpenShift Container Platform 4 | Affected | No fix yet |
| Red Hat OpenShift Container Platform 5 | Affected | No fix yet |
| Red Hat OpenShift GitOps | Affected | No fix yet |
| Red Hat OpenShift Virtualization 4 | Affected | No fix yet |
| Red Hat OpenShift distributed tracing 3 | Affected | No fix yet |
| Red Hat Openshift Data Foundation 4 | Affected | No fix yet |
| Red Hat Process Automation 7 | Affected | No fix yet |
| Red Hat Quay 3 | Affected | No fix yet |
| Red Hat Satellite 6 | Affected | No fix yet |
| Red Hat Single Sign-On 7 | Affected | No fix planned: Will not fix |
| Red Hat Trusted Artifact Signer | Affected | No fix yet |
| Red Hat Trusted Profile Analyzer | Affected | No fix yet |
| Red Hat build of Apache Camel - HawtIO 4 | Affected | No fix yet |
| Red Hat build of Apicurio Registry 2 | Affected | No fix yet |
| Red Hat build of Apicurio Registry 3 | Affected | No fix yet |
| Red Hat Data Grid 8.6.2 | Fixed | RHSA-2026:41951 |
| Red Hat Discovery 2 | Fixed | RHSA-2026:91967, RHSA-2026:92136 |
| Red Hat OpenShift AI 3.3 | Fixed | RHSA-2026:37275, RHSA-2026:73987 |
| Red Hat OpenShift AI 3.4 | Fixed | RHSA-2026:34456, RHSA-2026:60520 |
| Red Hat OpenShift Dev Spaces 3.29 | Fixed | RHSA-2026:48124 |
Not affected: 25 products
- Cryostat 4
- Gatekeeper 3
- Multicluster Engine for Kubernetes
- 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 Developer Hub 1
- Red Hat Discovery 2
- Red Hat Enterprise Linux 10
- Red Hat Enterprise Linux 8
- Red Hat Enterprise Linux 9
- Red Hat JBoss Enterprise Application Platform 8
- Red Hat JBoss Enterprise Application Platform Expansion Pack
- Red Hat OpenShift AI (RHOAI)
- Red Hat OpenShift AI 3.3
- Red Hat OpenShift AI 3.4
- Red Hat OpenShift Container Platform 4
- Red Hat OpenShift Container Platform 5
- Red Hat OpenShift Dev Spaces
- Red Hat OpenShift Dev Spaces 3.29
- Red Hat Satellite 6
- Red Hat build of Apache Camel for Spring Boot 4
- Self-service automation portal 2
Timeline
- 2026-10-02 Threatist record created from CVE-2026-33245
- 2026-10-03 Alias added: GHSA-8646-j5j9-6r62
- 2026-10-07 Fix available: RHSA-2026:73987 · Red Hat
- 2026-10-16 Affected versions changed · Red Hat
- 2026-10-18 Affected versions changed · Red Hat
- 2026-10-20 Affected versions changed · Red Hat
- 2026-10-21 Affected versions changed · Red Hat
- 2026-10-27 Affected versions changed · Red Hat
- 2026-10-30 Fix available: RHSA-2026:91967 · Red Hat
- 2026-10-30 Fix available: RHSA-2026:92136 · Red Hat
- 2026-10-30 Fix available: Red Hat Discovery 2 · Red Hat
- 2026-10-30 Affected versions changed · Red Hat
- 2026-10-31 Affected versions changed · Red Hat
References
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-2026-33245 · CVE Program
- CVE-2026-33245 · NVD
- FIRST EPSS
- GHSA-8646-j5j9-6r62 · GitHub Advisory Database · CC BY 4.0
- CVE-2026-33245 · 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