CVE-2026-42342 (GCVE-0-2026-42342)

Vulnerability from cvelistv5 – Published: 2026-06-02 18:23 – Updated: 2026-06-03 13:52
VLAI
Title
React Router vulnerable to DoS via unbounded path expansion in __manifest endpoint
Summary
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.
Severity
7.5 (High)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
SSVC
Exploitation: none Automatable: yes Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
  • CWE-400 - Uncontrolled Resource Consumption
Assigner
References
Impacted products
Show details on NVD website
To clipboard 

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-42342",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "yes"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-06-03T13:52:31.015400Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-06-03T13:52:43.400Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "product": "react-router",
          "vendor": "remix-run",
          "versions": [
            {
              "status": "affected",
              "version": "\u003e= 7.0.0, \u003c 7.15.0"
            }
          ]
        },
        {
          "product": "@remix-run/server-runtime",
          "vendor": "remix-run",
          "versions": [
            {
              "status": "affected",
              "version": "\u003e= 2.10.0, \u003c 2.17.5"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "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 (`\u003cBrowserRouter\u003e`) or Data Mode (`createBrowserRouter/\u003cRouterProvider\u003e`). This is patched in react-router version 7.15.0 and @remix-run/server-runtime version 2.17.5."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "HIGH",
            "baseScore": 7.5,
            "baseSeverity": "HIGH",
            "confidentialityImpact": "NONE",
            "integrityImpact": "NONE",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
            "version": "3.1"
          }
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-400",
              "description": "CWE-400: Uncontrolled Resource Consumption",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-06-02T18:23:02.765Z",
        "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
        "shortName": "GitHub_M"
      },
      "references": [
        {
          "name": "https://github.com/remix-run/react-router/security/advisories/GHSA-8x6r-g9mw-2r78",
          "tags": [
            "x_refsource_CONFIRM"
          ],
          "url": "https://github.com/remix-run/react-router/security/advisories/GHSA-8x6r-g9mw-2r78"
        }
      ],
      "source": {
        "advisory": "GHSA-8x6r-g9mw-2r78",
        "discovery": "UNKNOWN"
      },
      "title": "React Router vulnerable to DoS via unbounded path expansion in __manifest endpoint"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
    "assignerShortName": "GitHub_M",
    "cveId": "CVE-2026-42342",
    "datePublished": "2026-06-02T18:23:02.765Z",
    "dateReserved": "2026-04-26T13:26:14.514Z",
    "dateUpdated": "2026-06-03T13:52:43.400Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "epss": {
      "cve": "CVE-2026-42342",
      "date": "2026-07-20",
      "epss": "0.00299",
      "percentile": "0.21977"
    },
    "nvd": "{\"cve\":{\"id\":\"CVE-2026-42342\",\"sourceIdentifier\":\"security-advisories@github.com\",\"published\":\"2026-06-02T20:16:36.693\",\"lastModified\":\"2026-06-17T10:47:42.793\",\"vulnStatus\":\"Analyzed\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"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 (`\u003cBrowserRouter\u003e`) or Data Mode (`createBrowserRouter/\u003cRouterProvider\u003e`). This is patched in react-router version 7.15.0 and @remix-run/server-runtime version 2.17.5.\"}],\"affected\":[{\"source\":\"security-advisories@github.com\",\"affectedData\":[{\"vendor\":\"remix-run\",\"product\":\"react-router\",\"versions\":[{\"version\":\"\u003e= 7.0.0, \u003c 7.15.0\",\"status\":\"affected\"}]},{\"vendor\":\"remix-run\",\"product\":\"@remix-run/server-runtime\",\"versions\":[{\"version\":\"\u003e= 2.10.0, \u003c 2.17.5\",\"status\":\"affected\"}]}]}],\"metrics\":{\"cvssMetricV31\":[{\"source\":\"security-advisories@github.com\",\"type\":\"Secondary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H\",\"baseScore\":7.5,\"baseSeverity\":\"HIGH\",\"attackVector\":\"NETWORK\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"NONE\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"NONE\",\"integrityImpact\":\"NONE\",\"availabilityImpact\":\"HIGH\"},\"exploitabilityScore\":3.9,\"impactScore\":3.6}],\"ssvcV203\":[{\"source\":\"134c704f-9b21-4f2e-91b3-4a467353bcc0\",\"ssvcData\":{\"timestamp\":\"2026-06-03T13:52:31.015400Z\",\"id\":\"CVE-2026-42342\",\"options\":[{\"exploitation\":\"none\"},{\"automatable\":\"yes\"},{\"technicalImpact\":\"partial\"}],\"role\":\"CISA Coordinator\",\"version\":\"2.0.3\"}}]},\"weaknesses\":[{\"source\":\"security-advisories@github.com\",\"type\":\"Secondary\",\"description\":[{\"lang\":\"en\",\"value\":\"CWE-400\"}]}],\"configurations\":[{\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:shopify:react-router:*:*:*:*:*:node.js:*:*\",\"versionStartIncluding\":\"7.0.0\",\"versionEndExcluding\":\"7.15.0\",\"matchCriteriaId\":\"C3DEED53-C992-4595-AAA9-7A2BD7C06BA6\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:shopify:remix-run\\\\/server-runtime:*:*:*:*:*:node.js:*:*\",\"versionStartIncluding\":\"2.10.0\",\"versionEndExcluding\":\"2.17.5\",\"matchCriteriaId\":\"7C1BF7A9-CED0-415C-95CA-0CB594732263\"}]}]}],\"references\":[{\"url\":\"https://github.com/remix-run/react-router/security/advisories/GHSA-8x6r-g9mw-2r78\",\"source\":\"security-advisories@github.com\",\"tags\":[\"Vendor Advisory\"]}]}}",
    "redhat_vex": {
      "aggregate_severity": "Moderate",
      "current_release_date": "2026-07-20T16:43:21+00:00",
      "cve": "CVE-2026-42342",
      "id": "CVE-2026-42342",
      "initial_release_date": "2026-06-02T18:23:02.765000+00:00",
      "product_status:fixed": "1",
      "product_status:known_affected": "146",
      "product_status:known_not_affected": "27",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "react-router: @remix-run/server-runtime: React Router / Remix: Denial of Service via unbounded path expansion in __manifest endpoint",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-42342.json",
      "version": "3"
    },
    "suse_vex": {
      "aggregate_severity": "moderate",
      "current_release_date": "2026-06-04T02:24:05Z",
      "cve": "CVE-2026-42342",
      "id": "CVE-2026-42342",
      "initial_release_date": "2026-06-04T02:24:05Z",
      "product_status:known_affected": "14",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2026-42342",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2026-42342.json",
      "version": "2"
    },
    "vulnrichment": {
      "containers": "{\"cna\": {\"title\": \"React Router vulnerable to DoS via unbounded path expansion in __manifest endpoint\", \"problemTypes\": [{\"descriptions\": [{\"cweId\": \"CWE-400\", \"lang\": \"en\", \"description\": \"CWE-400: Uncontrolled Resource Consumption\", \"type\": \"CWE\"}]}], \"metrics\": [{\"cvssV3_1\": {\"attackComplexity\": \"LOW\", \"attackVector\": \"NETWORK\", \"availabilityImpact\": \"HIGH\", \"baseScore\": 7.5, \"baseSeverity\": \"HIGH\", \"confidentialityImpact\": \"NONE\", \"integrityImpact\": \"NONE\", \"privilegesRequired\": \"NONE\", \"scope\": \"UNCHANGED\", \"userInteraction\": \"NONE\", \"vectorString\": \"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H\", \"version\": \"3.1\"}}], \"references\": [{\"name\": \"https://github.com/remix-run/react-router/security/advisories/GHSA-8x6r-g9mw-2r78\", \"tags\": [\"x_refsource_CONFIRM\"], \"url\": \"https://github.com/remix-run/react-router/security/advisories/GHSA-8x6r-g9mw-2r78\"}], \"affected\": [{\"vendor\": \"remix-run\", \"product\": \"react-router\", \"versions\": [{\"version\": \"\u003e= 7.0.0, \u003c 7.15.0\", \"status\": \"affected\"}]}, {\"vendor\": \"remix-run\", \"product\": \"@remix-run/server-runtime\", \"versions\": [{\"version\": \"\u003e= 2.10.0, \u003c 2.17.5\", \"status\": \"affected\"}]}], \"providerMetadata\": {\"orgId\": \"a0819718-46f1-4df5-94e2-005712e83aaa\", \"shortName\": \"GitHub_M\", \"dateUpdated\": \"2026-06-02T18:23:02.765Z\"}, \"descriptions\": [{\"lang\": \"en\", \"value\": \"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 (`\u003cBrowserRouter\u003e`) or Data Mode (`createBrowserRouter/\u003cRouterProvider\u003e`). This is patched in react-router version 7.15.0 and @remix-run/server-runtime version 2.17.5.\"}], \"source\": {\"advisory\": \"GHSA-8x6r-g9mw-2r78\", \"discovery\": \"UNKNOWN\"}}, \"adp\": [{\"title\": \"CISA ADP Vulnrichment\", \"metrics\": [{\"other\": {\"type\": \"ssvc\", \"content\": {\"id\": \"CVE-2026-42342\", \"role\": \"CISA Coordinator\", \"options\": [{\"Exploitation\": \"none\"}, {\"Automatable\": \"yes\"}, {\"Technical Impact\": \"partial\"}], \"version\": \"2.0.3\", \"timestamp\": \"2026-06-03T13:52:31.015400Z\"}}}], \"providerMetadata\": {\"orgId\": \"134c704f-9b21-4f2e-91b3-4a467353bcc0\", \"shortName\": \"CISA-ADP\", \"dateUpdated\": \"2026-06-03T13:52:37.648Z\"}}]}",
      "cveMetadata": "{\"cveId\": \"CVE-2026-42342\", \"assignerOrgId\": \"a0819718-46f1-4df5-94e2-005712e83aaa\", \"state\": \"PUBLISHED\", \"assignerShortName\": \"GitHub_M\", \"dateReserved\": \"2026-04-26T13:26:14.514Z\", \"datePublished\": \"2026-06-02T18:23:02.765Z\", \"dateUpdated\": \"2026-06-03T13:52:43.400Z\"}",
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}



Log in or create an account to share your comment.




Tags
Taxonomy of the tags.





Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

Author Source Type Date Other

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


Detection rules are retrieved from Rulezet.