CVE-2026-55685

React Router is a router for React. In versions 7.0.0 through 7.17.0, the manifest endpoint could be accessed via unauthenticated targeted requests that would put heavy load on the server and slow down response times. This issue is a follow up to CVE-2026-42342, and does not does not impact React Router applications using Declarative Mode (<BrowserRouter>) or Data Mode (createBrowserRouter/<RouterProvider>). This issue has been fixed in version 7.18.0.

CVSS v3 7.5 HIGH

7.5^/10

CVSS v3 : HIGH

Vector :

Exploitability : 3.9 / Impact : 3.6

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://github.com/remix-run/react-router/blob/main/CHANGELOG.md#v7180	Release Notes
https://github.com/remix-run/react-router/commit/09e6020d1950e54f361f7ad00938ecd4dde60929	Patch
https://github.com/remix-run/react-router/pull/15186	Issue Tracking Patch
https://github.com/remix-run/react-router/releases/tag/react-router@7.18.0	Release Notes
https://github.com/remix-run/react-router/security/advisories/GHSA-8x6r-g9mw-2r78	Third Party Advisory
https://github.com/remix-run/react-router/security/advisories/GHSA-chx6-hx7r-mcp5	Third Party Advisory

Configurations

Configuration 1 (hide)

cpe:2.3:a:shopify:react-router:*:*:*:*:*:node.js:*:*

History

24 Oct 2026, 13:10

Type	Values Removed	Values Added
Summary		(es) React Router es un router para React. En las versiones 7.0.0 a 7.17.0, el endpoint del manifiesto podría ser accedido a través de solicitudes dirigidas no autenticadas que pondrían una carga pesada en el servidor y ralentizarían los tiempos de respuesta. Este problema es un seguimiento de CVE-2026-42342, y no impacta a las aplicaciones de React Router que usan el Modo Declarativo ([BrowserRouter]) o el Modo de Datos (createBrowserRouter/[RouterProvider]). Este problema ha sido solucionado en la versión 7.18.0.

Information

Published : 2026-07-27 22:17

Updated : 2026-10-24 13:10

NVD link : CVE-2026-55685

Mitre link : CVE-2026-55685

CVE.ORG link : CVE-2026-55685

JSON object : View

Products Affected

shopify

react-router

CWE

CWE-400

Uncontrolled Resource Consumption

CWE-407

Inefficient Algorithmic Complexity

{"id": "CVE-2026-55685", "cveTags": [], "metrics": {"ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-55685", "role": "CISA Coordinator", "options": [{"exploitation": "none"}, {"automatable": "yes"}, {"technicalImpact": "partial"}], "version": "2.0.3", "timestamp": "2026-07-28T13:39:39.469503Z"}}], "cvssMetricV31": [{"type": "Primary", "source": "nvd@nist.gov", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 7.5, "attackVector": "NETWORK", "baseSeverity": "HIGH", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H", "integrityImpact": "NONE", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "NONE", "confidentialityImpact": "NONE"}, "impactScore": 3.6, "exploitabilityScore": 3.9}], "cvssMetricV40": [{"type": "Secondary", "source": "security-advisories@github.com", "cvssData": {"Safety": "NOT_DEFINED", "version": "4.0", "Recovery": "NOT_DEFINED", "baseScore": 8.7, "Automatable": "NOT_DEFINED", "attackVector": "NETWORK", "baseSeverity": "HIGH", "valueDensity": "NOT_DEFINED", "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X", "exploitMaturity": "NOT_DEFINED", "providerUrgency": "NOT_DEFINED", "userInteraction": "NONE", "attackComplexity": "LOW", "attackRequirements": "NONE", "privilegesRequired": "NONE", "subIntegrityImpact": "NONE", "vulnIntegrityImpact": "NONE", "integrityRequirement": "NOT_DEFINED", "modifiedAttackVector": "NOT_DEFINED", "subAvailabilityImpact": "NONE", "vulnAvailabilityImpact": "HIGH", "availabilityRequirement": "NOT_DEFINED", "modifiedUserInteraction": "NOT_DEFINED", "modifiedAttackComplexity": "NOT_DEFINED", "subConfidentialityImpact": "NONE", "vulnConfidentialityImpact": "NONE", "confidentialityRequirement": "NOT_DEFINED", "modifiedAttackRequirements": "NOT_DEFINED", "modifiedPrivilegesRequired": "NOT_DEFINED", "modifiedSubIntegrityImpact": "NOT_DEFINED", "modifiedVulnIntegrityImpact": "NOT_DEFINED", "vulnerabilityResponseEffort": "NOT_DEFINED", "modifiedSubAvailabilityImpact": "NOT_DEFINED", "modifiedVulnAvailabilityImpact": "NOT_DEFINED", "modifiedSubConfidentialityImpact": "NOT_DEFINED", "modifiedVulnConfidentialityImpact": "NOT_DEFINED"}}]}, "affected": [{"source": "security-advisories@github.com", "affectedData": [{"vendor": "remix-run", "product": "react-router", "versions": [{"status": "affected", "version": ">= 7.0.0, < 7.18.0"}]}]}], "published": "2026-07-27T22:17:40.860", "references": [{"url": "https://github.com/remix-run/react-router/blob/main/CHANGELOG.md#v7180", "tags": ["Release Notes"], "source": "security-advisories@github.com"}, {"url": "https://github.com/remix-run/react-router/commit/09e6020d1950e54f361f7ad00938ecd4dde60929", "tags": ["Patch"], "source": "security-advisories@github.com"}, {"url": "https://github.com/remix-run/react-router/pull/15186", "tags": ["Issue Tracking", "Patch"], "source": "security-advisories@github.com"}, {"url": "https://github.com/remix-run/react-router/releases/tag/react-router@7.18.0", "tags": ["Release Notes"], "source": "security-advisories@github.com"}, {"url": "https://github.com/remix-run/react-router/security/advisories/GHSA-8x6r-g9mw-2r78", "tags": ["Third Party Advisory"], "source": "security-advisories@github.com"}, {"url": "https://github.com/remix-run/react-router/security/advisories/GHSA-chx6-hx7r-mcp5", "tags": ["Third Party Advisory"], "source": "security-advisories@github.com"}], "vulnStatus": "Analyzed", "weaknesses": [{"type": "Secondary", "source": "security-advisories@github.com", "description": [{"lang": "en", "value": "CWE-400"}, {"lang": "en", "value": "CWE-407"}]}], "descriptions": [{"lang": "en", "value": "React Router is a router for React. In versions 7.0.0 through 7.17.0, the manifest endpoint could be accessed via unauthenticated targeted requests that would put heavy load on the server and slow down response times. This issue is a follow up to CVE-2026-42342, and does not does not impact React Router applications using Declarative Mode (<BrowserRouter>) or Data Mode (createBrowserRouter/<RouterProvider>). This issue has been fixed in version 7.18.0."}, {"lang": "es", "value": "React Router es un router para React. En las versiones 7.0.0 a 7.17.0, el endpoint del manifiesto podr\u00eda ser accedido a trav\u00e9s de solicitudes dirigidas no autenticadas que pondr\u00edan una carga pesada en el servidor y ralentizar\u00edan los tiempos de respuesta. Este problema es un seguimiento de CVE-2026-42342, y no impacta a las aplicaciones de React Router que usan el Modo Declarativo ([BrowserRouter]) o el Modo de Datos (createBrowserRouter/[RouterProvider]). Este problema ha sido solucionado en la versi\u00f3n 7.18.0."}], "lastModified": "2026-10-24T13:10:00.147", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:a:shopify:react-router:*:*:*:*:*:node.js:*:*", "vulnerable": true, "matchCriteriaId": "335DEB83-1EF7-4BEF-9E57-07CDF97155CF", "versionEndExcluding": "7.18.0", "versionStartIncluding": "7.0.0"}], "operator": "OR"}]}], "sourceIdentifier": "security-advisories@github.com"}