CVE-2026-33245 (GCVE-0-2026-33245)
Vulnerability from cvelistv5 – Published: 2026-06-02 17:14 – Updated: 2026-06-03 19:09
VLAI
EPSS
VEX
Title
React Router vulnerable to XSS in unstable RSC redirect handling via javascript: redirect targets
Summary
React Router is a router for React. In versions 7.7.0 through 7.13.1, when using React Router's unstable React Server Components (RSC) APIs, there is a potential client-side Cross-Site Scripting (XSS) vulnerability in the RSC redirect handling if redirects come from untrusted sources. This does not impact applications that are not using the unstable RSC APIs in React Router. This is patched in version 7.13.2.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-06-03 19:09 UTC
CWE
- CWE-79 - Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://github.com/remix-run/react-router/securit… | x_refsource_CONFIRM |
Impacted products
1 product
| Vendor | Product | Version | CPE status | |
|---|---|---|---|---|
| remix-run | react-router |
Affected:
>= 7.7.0, < 7.13.2
|
guessed |
{
"containers": {
"adp": [
{
"metrics": [
{
"other": {
"content": {
"id": "CVE-2026-33245",
"options": [
{
"Exploitation": "none"
},
{
"Automatable": "no"
},
{
"Technical Impact": "partial"
}
],
"role": "CISA Coordinator",
"timestamp": "2026-06-03T19:09:10.638554Z",
"version": "2.0.3"
},
"type": "ssvc"
}
}
],
"providerMetadata": {
"dateUpdated": "2026-06-03T19:09:34.483Z",
"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= 7.7.0, \u003c 7.13.2"
}
]
}
],
"descriptions": [
{
"lang": "en",
"value": "React Router is a router for React. In versions 7.7.0 through 7.13.1, when using React Router\u0027s unstable React Server Components (RSC) APIs, there is a potential client-side Cross-Site Scripting (XSS) vulnerability in the RSC redirect handling if redirects come from untrusted sources. This does not impact applications that are not using the unstable RSC APIs in React Router. This is patched in version 7.13.2."
}
],
"metrics": [
{
"cvssV3_1": {
"attackComplexity": "HIGH",
"attackVector": "NETWORK",
"availabilityImpact": "NONE",
"baseScore": 8,
"baseSeverity": "HIGH",
"confidentialityImpact": "HIGH",
"integrityImpact": "HIGH",
"privilegesRequired": "NONE",
"scope": "CHANGED",
"userInteraction": "REQUIRED",
"vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:H/I:H/A:N",
"version": "3.1"
}
}
],
"problemTypes": [
{
"descriptions": [
{
"cweId": "CWE-79",
"description": "CWE-79: Improper Neutralization of Input During Web Page Generation (\u0027Cross-site Scripting\u0027)",
"lang": "en",
"type": "CWE"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2026-06-02T17:31:20.244Z",
"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
"shortName": "GitHub_M"
},
"references": [
{
"name": "https://github.com/remix-run/react-router/security/advisories/GHSA-8646-j5j9-6r62",
"tags": [
"x_refsource_CONFIRM"
],
"url": "https://github.com/remix-run/react-router/security/advisories/GHSA-8646-j5j9-6r62"
}
],
"source": {
"advisory": "GHSA-8646-j5j9-6r62",
"discovery": "UNKNOWN"
},
"title": "React Router vulnerable to XSS in unstable RSC redirect handling via javascript: redirect targets"
}
},
"cveMetadata": {
"assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
"assignerShortName": "GitHub_M",
"cveId": "CVE-2026-33245",
"datePublished": "2026-06-02T17:14:50.377Z",
"dateReserved": "2026-03-18T02:42:27.509Z",
"dateUpdated": "2026-06-03T19:09:34.483Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2",
"vulnerability-lookup:meta": {
"epss": {
"cve": "CVE-2026-33245",
"date": "2026-09-23",
"epss": "0.00189",
"percentile": "0.08741"
},
"nvd": {
"cve": {
"affected": [
{
"affectedData": [
{
"product": "react-router",
"vendor": "remix-run",
"versions": [
{
"status": "affected",
"version": "\u003e= 7.7.0, \u003c 7.13.2"
}
]
}
],
"source": "security-advisories@github.com"
}
],
"configurations": [
{
"nodes": [
{
"cpeMatch": [
{
"criteria": "cpe:2.3:a:shopify:react-router:*:*:*:*:*:node.js:*:*",
"matchCriteriaId": "C2AE5793-49DC-4B7A-A844-267AF5EE9080",
"versionEndExcluding": "7.13.2",
"versionStartIncluding": "7.7.0",
"vulnerable": true
}
],
"negate": false,
"operator": "OR"
}
]
}
],
"cveTags": [],
"descriptions": [
{
"lang": "en",
"value": "React Router is a router for React. In versions 7.7.0 through 7.13.1, when using React Router\u0027s unstable React Server Components (RSC) APIs, there is a potential client-side Cross-Site Scripting (XSS) vulnerability in the RSC redirect handling if redirects come from untrusted sources. This does not impact applications that are not using the unstable RSC APIs in React Router. This is patched in version 7.13.2."
},
{
"lang": "es",
"value": "React Router es un router para React. En las versiones 7.7.0 a la 7.13.1, al usar las API inestables de React Server Components (RSC) de React Router, existe una potencial vulnerabilidad de Cross-Site Scripting (XSS) del lado del cliente en el manejo de redirecciones de RSC si las redirecciones provienen de fuentes no confiables. Esto no tiene impacto en las aplicaciones que no est\u00e1n usando las API inestables de RSC en React Router. Esto est\u00e1 parcheado en la versi\u00f3n 7.13.2."
}
],
"id": "CVE-2026-33245",
"lastModified": "2026-07-22T19:10:00.120",
"metrics": {
"cvssMetricV31": [
{
"cvssData": {
"attackComplexity": "HIGH",
"attackVector": "NETWORK",
"availabilityImpact": "NONE",
"baseScore": 8.0,
"baseSeverity": "HIGH",
"confidentialityImpact": "HIGH",
"integrityImpact": "HIGH",
"privilegesRequired": "NONE",
"scope": "CHANGED",
"userInteraction": "REQUIRED",
"vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:H/I:H/A:N",
"version": "3.1"
},
"exploitabilityScore": 1.6,
"impactScore": 5.8,
"source": "security-advisories@github.com",
"type": "Secondary"
},
{
"cvssData": {
"attackComplexity": "HIGH",
"attackVector": "NETWORK",
"availabilityImpact": "NONE",
"baseScore": 4.7,
"baseSeverity": "MEDIUM",
"confidentialityImpact": "LOW",
"integrityImpact": "LOW",
"privilegesRequired": "NONE",
"scope": "CHANGED",
"userInteraction": "REQUIRED",
"vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:L/I:L/A:N",
"version": "3.1"
},
"exploitabilityScore": 1.6,
"impactScore": 2.7,
"source": "nvd@nist.gov",
"type": "Primary"
}
],
"ssvcV203": [
{
"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"ssvcData": {
"id": "CVE-2026-33245",
"options": [
{
"exploitation": "none"
},
{
"automatable": "no"
},
{
"technicalImpact": "partial"
}
],
"role": "CISA Coordinator",
"timestamp": "2026-06-03T19:09:10.638554Z",
"version": "2.0.3"
}
}
]
},
"published": "2026-06-02T20:16:34.367",
"references": [
{
"source": "security-advisories@github.com",
"tags": [
"Vendor Advisory"
],
"url": "https://github.com/remix-run/react-router/security/advisories/GHSA-8646-j5j9-6r62"
}
],
"sourceIdentifier": "security-advisories@github.com",
"vulnStatus": "Analyzed",
"weaknesses": [
{
"description": [
{
"lang": "en",
"value": "CWE-79"
}
],
"source": "security-advisories@github.com",
"type": "Secondary"
}
]
}
},
"redhat_vex": {
"aggregate_severity": "Moderate",
"current_release_date": "2026-09-07T10:16:23+00:00",
"cve": "CVE-2026-33245",
"id": "CVE-2026-33245",
"initial_release_date": "2026-06-02T17:14:50.377000+00:00",
"product_status:fixed": "53",
"product_status:known_affected": "155",
"product_status:known_not_affected": "899",
"source": "Red Hat CSAF VEX",
"status": "final",
"title": "react-router: React Router: Cross-Site Scripting vulnerability via untrusted React Server Component redirects",
"url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-33245.json",
"version": "3"
},
"suse_vex": {
"aggregate_severity": "moderate",
"current_release_date": "2026-09-23T00:27:12Z",
"cve": "CVE-2026-33245",
"id": "CVE-2026-33245",
"initial_release_date": "2026-06-04T02:25:19Z",
"product_status:recommended": "1",
"source": "SUSE CSAF VEX",
"status": "interim",
"title": "SUSE CVE CVE-2026-33245",
"url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2026-33245.json",
"version": "3"
},
"vulnrichment": {
"containers": {
"adp": [
{
"metrics": [
{
"other": {
"content": {
"id": "CVE-2026-33245",
"options": [
{
"Exploitation": "none"
},
{
"Automatable": "no"
},
{
"Technical Impact": "partial"
}
],
"role": "CISA Coordinator",
"timestamp": "2026-06-03T19:09:10.638554Z",
"version": "2.0.3"
},
"type": "ssvc"
}
}
],
"providerMetadata": {
"dateUpdated": "2026-06-03T19:09:14.803Z",
"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= 7.7.0, \u003c 7.13.2"
}
]
}
],
"descriptions": [
{
"lang": "en",
"value": "React Router is a router for React. In versions 7.7.0 through 7.13.1, when using React Router\u0027s unstable React Server Components (RSC) APIs, there is a potential client-side Cross-Site Scripting (XSS) vulnerability in the RSC redirect handling if redirects come from untrusted sources. This does not impact applications that are not using the unstable RSC APIs in React Router. This is patched in version 7.13.2."
}
],
"metrics": [
{
"cvssV3_1": {
"attackComplexity": "HIGH",
"attackVector": "NETWORK",
"availabilityImpact": "NONE",
"baseScore": 8,
"baseSeverity": "HIGH",
"confidentialityImpact": "HIGH",
"integrityImpact": "HIGH",
"privilegesRequired": "NONE",
"scope": "CHANGED",
"userInteraction": "REQUIRED",
"vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:H/I:H/A:N",
"version": "3.1"
}
}
],
"problemTypes": [
{
"descriptions": [
{
"cweId": "CWE-79",
"description": "CWE-79: Improper Neutralization of Input During Web Page Generation (\u0027Cross-site Scripting\u0027)",
"lang": "en",
"type": "CWE"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2026-06-02T17:31:20.244Z",
"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
"shortName": "GitHub_M"
},
"references": [
{
"name": "https://github.com/remix-run/react-router/security/advisories/GHSA-8646-j5j9-6r62",
"tags": [
"x_refsource_CONFIRM"
],
"url": "https://github.com/remix-run/react-router/security/advisories/GHSA-8646-j5j9-6r62"
}
],
"source": {
"advisory": "GHSA-8646-j5j9-6r62",
"discovery": "UNKNOWN"
},
"title": "React Router vulnerable to XSS in unstable RSC redirect handling via javascript: redirect targets"
}
},
"cveMetadata": {
"assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
"assignerShortName": "GitHub_M",
"cveId": "CVE-2026-33245",
"datePublished": "2026-06-02T17:14:50.377Z",
"dateReserved": "2026-03-18T02:42:27.509Z",
"dateUpdated": "2026-06-03T19:09:34.483Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2"
}
}
}
Loading…
Loading…
Experimental. This forecast is provided for visualization only and may change without notice. Do not use it for operational decisions.
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.
Loading…
Loading…
The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the
vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base
model, served locally by ML-Gateway.
They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
Loading…
Related by attack behaviour
Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.
Loading…