CVE•Published 2026-06-02•Modified 2026-06-04•1 article on news•6 live references•NVD data

CVE-2026-42211Shopify · React-router

Vulnerability data via NVD (ingested)

CVSS v3.1

8.1

HIGH

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

EPSS percentile

Exploit Prediction Scoring System · top 51% of all CVEs

Weaknesses (CWE)

CWE-502Deserialization of Untrusted Data

Description

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.

Timeline

Published 2026-06-02

Modified 2026-06-04

External references

NVD MITRE Exploit-DB GitHub PoC Sploitus VulnCheck

Search for exposed instances

Shodan + Censys queries derived from NVD's CPE data. The vuln tag catches assets Shodan has explicitly linked to this CVE; the product / banner fingerprints find exposed instances even when the vuln tag was never applied (which is common).

Shodan · vuln tag0 hosts

vuln:CVE-2026-42211

Hosts Shodan has explicitly fingerprinted as vulnerable.

Shodan · product

product:"Shopify React-router"

All exposed Shopify React-router instances — cross-reference with the CVE's affected-version range.

Shodan · banner/body mention

http.html:"React-router"

HTTP body or banner mentions "React-router" — catches deploys Shodan didn't identify as a product.

More intel sources (5)

Shodan report

vuln:CVE-2026-42211