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CVE-2026-21884

React Router SSR XSS in ScrollRestoration

Published: Jan 10, 2026Updated: Jul 15, 2026 Sources: CVE List NVD GHSACWE-79
8.2HIGH
NVD MITRE
EPSS Score
0.5%
Top 61.0%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
Patch Available
Self-Check
OpenVAS

Description

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.

No summary for this CVE yet.

CVSS Vector Breakdown

AV:NAC:LPR:NUI:RS:CC:HI:LA:N
Exploitability
AV:NAttack Vector
Network
AC:LAttack Complexity
Low
PR:NPrivileges Required
None
UI:RUser Interaction
Required
Scope
S:CScope
Changed
Impact
C:HConfidentiality
High
I:LIntegrity
Low
A:NAvailability
None
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Weaknesses

CWE-79

Affected Products

shopify
commercial·US
react-routerSaaS
Web & CMS Plugins / ecommerce-platform
remix-run\/reactSaaS
Web & CMS Plugins / ecommerce-platform
npm
package-ecosystem
react-router
OSS Libraries
@remix-run/react
OSS Libraries
remix-run
oss-project
react-routerLibrary
OSS Libraries / web-framework

Exploitability

Official Patch Available
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Attack Graph

Products CVE Techniques Tactics

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MITRE ATT&CK

2 techniques
Execution
Initial Access
View detailed technique mapping

References

https://github.com/remix-run/react-router/security/advisories/GHSA-8v8x-cx79-35w7
github.com
https://access.redhat.com/errata/RHSA-2026:19712
access.redhat.com
https://access.redhat.com/errata/RHSA-2026:3782
access.redhat.com
and 7 more references View all →

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