Bug 2484115 (CVE-2026-42211) - CVE-2026-42211 react-router: React Router: Remote Code Execution via prototype pollution in Framework Mode
Summary: CVE-2026-42211 react-router: React Router: Remote Code Execution via prototyp...
Keywords:
Status: NEW
Alias: CVE-2026-42211
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
high
high
Target Milestone: ---
Assignee: Product Security
QA Contact:
URL:
Whiteboard:
Depends On: 2502731 2502733 2502734 2502732 2502735 2502736 2502737 2502738
Blocks:
TreeView+ depends on / blocked
 
Reported: 2026-06-02 20:02 UTC by OSIDB Bzimport
Modified: 2026-08-15 08:28 UTC (History)
184 users (show)

Fixed In Version:
Clone Of:
Environment:
Last Closed:
Embargoed:

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System ID Private Priority Status Summary Last Updated
Red Hat Product Errata RHSA-2026:41951 0 None None None 2026-07-20 11:59:32 UTC

Description OSIDB Bzimport 2026-06-02 20:02:29 UTC 
React Router is a router for React. In versions 7.0.0 through 7.14.1, when using Framework Mode, a combination of steps could potentially allow unauthorized remote code execution (RCE) through external requests. This attack requires the application code to have an existing prototype pollution vulnerability, which can then be leveraged in a 2-step attack where the second step triggers unauthorized RCE on the remote server. This does not impact applications using Declarative Mode (`<BrowserRouter>`) or Data Mode (`createBrowserRouter/<RouterProvider>`). This is patched in version 7.14.2.
Comment 2 David Hanina 2026-06-03 06:49:15 UTC 
As FreeIPA goes, we can safely waive this one, as we use Declarative mode, which is not affected
Comment 5 errata-xmlrpc 2026-07-20 11:59:22 UTC 
This issue has been addressed in the following products:

  Red Hat Data Grid 8.6.2

Via RHSA-2026:41951 https://access.redhat.com/errata/RHSA-2026:41951
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