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TI-2026-17585 Aliases CVE-2026-21884GHSA-8v8x-cx79-35w7

React Router SSR XSS in ScrollRestoration

Priority LOW 38CWE-79Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
Required
Attack complexity
Low
Impact type
Cross-site scripting
Confidentiality · integrity · availability
High · Low · None
Fix status
Fixed

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 @remix-run/react version prior to 2.17.3. and react-router 7.0.0 through 7.11.0, a XSS vulnerability exists in in React Router's <ScrollRestoration> API in Framework Mode when using the getKey/storageKey props during Server-Side Rendering which could allow arbitrary JavaScript execution during SSR if untrusted content is used to generate the keys. There is no impact if server-side rendering in Framework Mode is disabled, or if Declarative Mode (<BrowserRouter>) or Data Mode (createBrowserRouter/<RouterProvider>) is being used. This issue has been patched in @remix-run/react version 2.17.3 and react-router version 7.12.0.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00531 45th percentileScored 2026-11-07
Fix Fixed react-router (npm): 7.12.0@remix-run/react (npm): 2.17.3Red Hat: 4 advisories

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Total

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
remix-runreact-router@remix-run/react < 2.17.3; react-router >= 7.0.0, < 7.12.0—No fix listedCNA
—react-router (npm)7.0.0 to before 7.12.07.12.0Patch availableGHSA-8v8x-cx79-35w7
—@remix-run/react (npm)before 2.17.32.17.3Patch availableGHSA-8v8x-cx79-35w7
  • react-router Vendorremix-run Affected @remix-run/react < 2.17.3; react-router >= 7.0.0, < 7.12.0 Fixed in — No fix listed CNA
  • react-router (npm) Vendor— Affected 7.0.0 to before 7.12.0 Fixed in 7.12.0 Patch available GHSA-8v8x-cx79-35w7
  • @remix-run/react (npm) Vendor— Affected before 2.17.3 Fixed in 2.17.3 Patch available GHSA-8v8x-cx79-35w7

CPE configurations NVD · 2

CPEVersionsRoleVendor
cpe:2.3:a:shopify:react-router:*:*:*:*:*:node.js:*:*7.0.0 – 7.11.0Vulnerableremix-run
cpe:2.3:a:shopify:remix-run\/react:*:*:*:*:*:node.js:*:*before 2.17.3Vulnerableremix-run
  • cpe:2.3:a:shopify:react-router:*:*:*:*:*:node.js:*:* Versions 7.0.0 – 7.11.0 Vulnerable ·remix-run
  • cpe:2.3:a:shopify:remix-run\/react:*:*:*:*:*:node.js:*:* Versions before 2.17.3 Vulnerable ·remix-run

Remediation

  • Fix · GHSA-8v8x-cx79-35w7 react-router (npm) Fixed in 7.12.0 Advisory →
  • Fix · GHSA-8v8x-cx79-35w7 @remix-run/react (npm) Fixed in 2.17.3 Advisory →

Red Hat 4 advisories

  • RHSA-2026:19712 Released 2026-05-20 · Red Hat rating Critical
    RHOAI 3.3.3 - 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 +33
  • RHSA-2026:3960 Released 2026-03-06 · Red Hat rating Important
    Red Hat Ansible Automation Platform 2.6 Container Release Update
    • Red Hat Ansible Automation Platform 2.6 registry.redhat.io/ansible-automation-platform-26/de-minimal-rhel9, registry.redhat.io/ansible-automation-platform-26/de-supported-rhel9, registry.redhat.io/ansible-automation-platform-26/ee-minimal-rhel9 +9
  • RHSA-2026:3958 Released 2026-03-06 · Red Hat rating Important
    Red Hat Ansible Automation Platform 2.6 Product Security and Bug Fix Update
    • Red Hat Ansible Automation Platform 2.6 for RHEL 10 receptor-1.6.3-4.el10ap, receptorctl-1.6.3-4.el10ap
    • Red Hat Ansible Automation Platform 2.6 for RHEL 9 automation-controller-4.7.9-1.el9ap, automation-controller-cli-4.7.9-1.el9ap, automation-controller-server-4.7.9-1.el9ap +8
Show 1 more Red Hat advisories
  • RHSA-2026:3782 Released 2026-03-04 · Red Hat rating Critical
    RHOAI 2.25.3 - Red Hat OpenShift AI
    • Red Hat OpenShift AI 2.25 registry.redhat.io/rhoai/odh-caikit-tgis-serving-rhel9, registry.redhat.io/rhoai/odh-codeflare-operator-rhel9, registry.redhat.io/rhoai/odh-dashboard-rhel9 +27

Vendor assessments

Red Hat

Red Hat rating: Important. Red Hat's page for this CVE →

ProductStatusPlan or fix
Red Hat Ansible Automation Platform 2.6Fixed RHSA-2026:3960
Red Hat Ansible Automation Platform 2.6 for RHEL 9Fixed RHSA-2026:3958
Red Hat OpenShift AI 2.25Fixed RHSA-2026:3782
Red Hat OpenShift AI 3.3Fixed RHSA-2026:19712
Not affected: 8 products
  • Red Hat Ansible Automation Platform 2.6
  • Red Hat Ansible Automation Platform 2.6 for RHEL 10
  • Red Hat Ansible Automation Platform 2.6 for RHEL 9
  • Red Hat Build of Kueue
  • Red Hat Enterprise Linux 10
  • Red Hat Enterprise Linux 9
  • Red Hat OpenShift AI 2.25
  • Red Hat OpenShift AI 3.3

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-21884
  2. 2026-10-03 Alias added: GHSA-8v8x-cx79-35w7

References

Advisory 2

Other 11

  • 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-2026-30532 Deserialization of untrusted data in remix-run react-router CVSS 3.1HIGH 8.1
  • TI-2026-28995 Open redirect in remix-run react-router CVSS 4.0MEDIUM 6.6
See all 15 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences