Description
React Router is a router for React. In versions 7.0.0 through 7.14.x of react-router and versions 2.10.0 through 2.17.4 of @remix-run/server-runtime, certain crafted requests can consume disproportionate server resources via unbounded path expansion in the __manifest endpoint, resulting in response time degradation and/or service unavailability for end users. This affects React Router Framework Mode applications as well as Remix applications. This does not impact applications using Declarative Mode (`<BrowserRouter>`) or Data Mode (`createBrowserRouter/<RouterProvider>`). This is patched in react-router version 7.15.0 and @remix-run/server-runtime version 2.17.5.
Published: 2026-06-02
Score: 7.5 High
EPSS: < 1% Very Low
KEV: No
Impact: n/a
Action: n/a
AI Analysis

Analysis and contextual insights are available on OpenCVE Cloud.

Remediation

No vendor fix or workaround currently provided.

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Tracking

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Advisories
Source ID Title
Github GHSA Github GHSA GHSA-8x6r-g9mw-2r78 React Router vulnerable to DoS via unbounded path expansion in __manifest endpoint
History

Fri, 26 Jun 2026 00:15:00 +0000

Type Values Removed Values Added
Weaknesses CWE-770
References
Metrics threat_severity

None

threat_severity

Moderate


Thu, 04 Jun 2026 19:15:00 +0000

Type Values Removed Values Added
First Time appeared Shopify
Shopify react-router
Shopify remix-run\/server-runtime
CPEs cpe:2.3:a:shopify:react-router:*:*:*:*:*:node.js:*:*
cpe:2.3:a:shopify:remix-run\/server-runtime:*:*:*:*:*:node.js:*:*
Vendors & Products Shopify
Shopify react-router
Shopify remix-run\/server-runtime

Wed, 03 Jun 2026 14:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Wed, 03 Jun 2026 12:45:00 +0000

Type Values Removed Values Added
First Time appeared Remix-run
Remix-run react-router
Remix-run server-runtime
Vendors & Products Remix-run
Remix-run react-router
Remix-run server-runtime

Wed, 03 Jun 2026 02:30:00 +0000

Type Values Removed Values Added
Description React Router is a router for React. In versions 7.0.0 through 7.14.x of react-router and versions 2.10.0 through 2.17.4 of @remix-run/server-runtime, certain crafted requests can consume disproportionate server resources via unbounded path expansion in the __manifest endpoint, resulting in response time degradation and/or service unavailability for end users. This affects React Router Framework Mode applications as well as Remix applications. This does not impact applications using Declarative Mode (`<BrowserRouter>`) or Data Mode (`createBrowserRouter/<RouterProvider>`). This is patched in react-router version 7.15.0 and @remix-run/server-runtime version 2.17.5.
Title React Router vulnerable to DoS via unbounded path expansion in __manifest endpoint
Weaknesses CWE-400
References
Metrics cvssV3_1

{'score': 7.5, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H'}


Subscriptions

Remix-run React-router Server-runtime
Shopify React-router Remix-run\/server-runtime
cve-icon MITRE

Status: PUBLISHED

Assigner: GitHub_M

Published:

Updated: 2026-06-03T13:52:43.400Z

Reserved: 2026-04-26T13:26:14.514Z

Link: CVE-2026-42342

cve-icon Vulnrichment

Updated: 2026-06-03T13:52:37.648Z

cve-icon NVD

Status : Analyzed

Published: 2026-06-02T20:16:36.693

Modified: 2026-06-04T19:00:32.600

Link: CVE-2026-42342

cve-icon Redhat

Severity : Moderate

Publid Date: 2026-06-02T18:23:02Z

Links: CVE-2026-42342 - Bugzilla

cve-icon OpenCVE Enrichment

Updated: 2026-06-26T02:15:15Z

Weaknesses