CVE-2026-55685 (GCVE-0-2026-55685)
Vulnerability from cvelistv5
Published
2026-07-27 21:45
Modified
2026-07-28 13:40
Severity ?
VLAI Severity ?
EPSS score ?
Summary
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.
References
| URL | Tags | |
|---|---|---|
|
|
||
Impacted products
| Vendor | Product | Version | ||
|---|---|---|---|---|
| remix-run | react-router |
Version: >= 7.0.0, < 7.18.0 |
{
"containers": {
"adp": [
{
"metrics": [
{
"other": {
"content": {
"id": "CVE-2026-55685",
"options": [
{
"Exploitation": "none"
},
{
"Automatable": "yes"
},
{
"Technical Impact": "partial"
}
],
"role": "CISA Coordinator",
"timestamp": "2026-07-28T13:39:39.469503Z",
"version": "2.0.3"
},
"type": "ssvc"
}
}
],
"providerMetadata": {
"dateUpdated": "2026-07-28T13:40:04.996Z",
"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 7.18.0"
}
]
}
],
"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 (\u003cBrowserRouter\u003e) or Data Mode (createBrowserRouter/\u003cRouterProvider\u003e). This issue has been fixed in version 7.18.0."
}
],
"metrics": [
{
"cvssV4_0": {
"attackComplexity": "LOW",
"attackRequirements": "NONE",
"attackVector": "NETWORK",
"baseScore": 8.7,
"baseSeverity": "HIGH",
"privilegesRequired": "NONE",
"subAvailabilityImpact": "NONE",
"subConfidentialityImpact": "NONE",
"subIntegrityImpact": "NONE",
"userInteraction": "NONE",
"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",
"version": "4.0",
"vulnAvailabilityImpact": "HIGH",
"vulnConfidentialityImpact": "NONE",
"vulnIntegrityImpact": "NONE"
}
}
],
"problemTypes": [
{
"descriptions": [
{
"cweId": "CWE-400",
"description": "CWE-400: Uncontrolled Resource Consumption",
"lang": "en",
"type": "CWE"
}
]
},
{
"descriptions": [
{
"cweId": "CWE-407",
"description": "CWE-407: Inefficient Algorithmic Complexity",
"lang": "en",
"type": "CWE"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2026-07-27T21:45:57.751Z",
"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
"shortName": "GitHub_M"
},
"references": [
{
"name": "https://github.com/remix-run/react-router/security/advisories/GHSA-chx6-hx7r-mcp5",
"tags": [
"x_refsource_CONFIRM"
],
"url": "https://github.com/remix-run/react-router/security/advisories/GHSA-chx6-hx7r-mcp5"
},
{
"name": "https://github.com/remix-run/react-router/security/advisories/GHSA-8x6r-g9mw-2r78",
"tags": [
"x_refsource_MISC"
],
"url": "https://github.com/remix-run/react-router/security/advisories/GHSA-8x6r-g9mw-2r78"
},
{
"name": "https://github.com/remix-run/react-router/pull/15186",
"tags": [
"x_refsource_MISC"
],
"url": "https://github.com/remix-run/react-router/pull/15186"
},
{
"name": "https://github.com/remix-run/react-router/commit/09e6020d1950e54f361f7ad00938ecd4dde60929",
"tags": [
"x_refsource_MISC"
],
"url": "https://github.com/remix-run/react-router/commit/09e6020d1950e54f361f7ad00938ecd4dde60929"
},
{
"name": "https://github.com/remix-run/react-router/blob/main/CHANGELOG.md#v7180",
"tags": [
"x_refsource_MISC"
],
"url": "https://github.com/remix-run/react-router/blob/main/CHANGELOG.md#v7180"
},
{
"name": "https://github.com/remix-run/react-router/releases/tag/react-router@7.18.0",
"tags": [
"x_refsource_MISC"
],
"url": "https://github.com/remix-run/react-router/releases/tag/react-router@7.18.0"
}
],
"source": {
"advisory": "GHSA-chx6-hx7r-mcp5",
"discovery": "UNKNOWN"
},
"title": "React Router: Unauthenticated Denial of Service via Inefficient Route Matching"
}
},
"cveMetadata": {
"assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
"assignerShortName": "GitHub_M",
"cveId": "CVE-2026-55685",
"datePublished": "2026-07-27T21:45:57.751Z",
"dateReserved": "2026-06-17T00:13:10.650Z",
"dateUpdated": "2026-07-28T13:40:04.996Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2",
"vulnerability-lookup:meta": {
"vulnrichment": {
"containers": "{\"cna\": {\"title\": \"React Router: Unauthenticated Denial of Service via Inefficient Route Matching\", \"problemTypes\": [{\"descriptions\": [{\"cweId\": \"CWE-400\", \"lang\": \"en\", \"description\": \"CWE-400: Uncontrolled Resource Consumption\", \"type\": \"CWE\"}]}, {\"descriptions\": [{\"cweId\": \"CWE-407\", \"lang\": \"en\", \"description\": \"CWE-407: Inefficient Algorithmic Complexity\", \"type\": \"CWE\"}]}], \"metrics\": [{\"cvssV4_0\": {\"attackVector\": \"NETWORK\", \"attackComplexity\": \"LOW\", \"attackRequirements\": \"NONE\", \"privilegesRequired\": \"NONE\", \"userInteraction\": \"NONE\", \"vulnConfidentialityImpact\": \"NONE\", \"vulnIntegrityImpact\": \"NONE\", \"vulnAvailabilityImpact\": \"HIGH\", \"subConfidentialityImpact\": \"NONE\", \"subIntegrityImpact\": \"NONE\", \"subAvailabilityImpact\": \"NONE\", \"baseScore\": 8.7, \"baseSeverity\": \"HIGH\", \"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\", \"version\": \"4.0\"}}], \"references\": [{\"name\": \"https://github.com/remix-run/react-router/security/advisories/GHSA-chx6-hx7r-mcp5\", \"tags\": [\"x_refsource_CONFIRM\"], \"url\": \"https://github.com/remix-run/react-router/security/advisories/GHSA-chx6-hx7r-mcp5\"}, {\"name\": \"https://github.com/remix-run/react-router/security/advisories/GHSA-8x6r-g9mw-2r78\", \"tags\": [\"x_refsource_MISC\"], \"url\": \"https://github.com/remix-run/react-router/security/advisories/GHSA-8x6r-g9mw-2r78\"}, {\"name\": \"https://github.com/remix-run/react-router/pull/15186\", \"tags\": [\"x_refsource_MISC\"], \"url\": \"https://github.com/remix-run/react-router/pull/15186\"}, {\"name\": \"https://github.com/remix-run/react-router/commit/09e6020d1950e54f361f7ad00938ecd4dde60929\", \"tags\": [\"x_refsource_MISC\"], \"url\": \"https://github.com/remix-run/react-router/commit/09e6020d1950e54f361f7ad00938ecd4dde60929\"}, {\"name\": \"https://github.com/remix-run/react-router/blob/main/CHANGELOG.md#v7180\", \"tags\": [\"x_refsource_MISC\"], \"url\": \"https://github.com/remix-run/react-router/blob/main/CHANGELOG.md#v7180\"}, {\"name\": \"https://github.com/remix-run/react-router/releases/tag/react-router@7.18.0\", \"tags\": [\"x_refsource_MISC\"], \"url\": \"https://github.com/remix-run/react-router/releases/tag/react-router@7.18.0\"}], \"affected\": [{\"vendor\": \"remix-run\", \"product\": \"react-router\", \"versions\": [{\"version\": \"\u003e= 7.0.0, \u003c 7.18.0\", \"status\": \"affected\"}]}], \"providerMetadata\": {\"orgId\": \"a0819718-46f1-4df5-94e2-005712e83aaa\", \"shortName\": \"GitHub_M\", \"dateUpdated\": \"2026-07-27T21:45:57.751Z\"}, \"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 (\u003cBrowserRouter\u003e) or Data Mode (createBrowserRouter/\u003cRouterProvider\u003e). This issue has been fixed in version 7.18.0.\"}], \"source\": {\"advisory\": \"GHSA-chx6-hx7r-mcp5\", \"discovery\": \"UNKNOWN\"}}, \"adp\": [{\"title\": \"CISA ADP Vulnrichment\", \"metrics\": [{\"other\": {\"type\": \"ssvc\", \"content\": {\"id\": \"CVE-2026-55685\", \"role\": \"CISA Coordinator\", \"options\": [{\"Exploitation\": \"none\"}, {\"Automatable\": \"yes\"}, {\"Technical Impact\": \"partial\"}], \"version\": \"2.0.3\", \"timestamp\": \"2026-07-28T13:39:39.469503Z\"}}}], \"providerMetadata\": {\"orgId\": \"134c704f-9b21-4f2e-91b3-4a467353bcc0\", \"shortName\": \"CISA-ADP\", \"dateUpdated\": \"2026-07-28T13:39:51.279Z\"}}]}",
"cveMetadata": "{\"cveId\": \"CVE-2026-55685\", \"assignerOrgId\": \"a0819718-46f1-4df5-94e2-005712e83aaa\", \"state\": \"PUBLISHED\", \"assignerShortName\": \"GitHub_M\", \"dateReserved\": \"2026-06-17T00:13:10.650Z\", \"datePublished\": \"2026-07-27T21:45:57.751Z\", \"dateUpdated\": \"2026-07-28T13:40:04.996Z\"}",
"dataType": "CVE_RECORD",
"dataVersion": "5.2"
}
}
}
Loading…
Loading…
Sightings
| Author | Source | Type | Date |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
- Confirmed: The vulnerability is confirmed from an analyst perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
- Patched: This vulnerability was successfully patched by the user reporting the sighting.
- Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
- Not confirmed: The user expresses doubt about the veracity of the vulnerability.
- Not patched: This vulnerability was not successfully patched by the user reporting the sighting.
Loading…
Loading…