Vulnerability-Lookup

CVE-2026-21884 (GCVE-0-2026-21884)

Vulnerability from cvelistv5 – Published: 2026-01-10 02:41 – Updated: 2026-06-30 12:06

Title

React Router SSR XSS in ScrollRestoration

Summary

React Router is a router for React. In @remix-run/react version prior to 2.17.3. and react-router 7.0.0 through 7.11.0, a XSS vulnerability exists in in React Router's <ScrollRestoration> API in Framework Mode when using the getKey/storageKey props during Server-Side Rendering which could allow arbitrary JavaScript execution during SSR if untrusted content is used to generate the keys. There is no impact if server-side rendering in Framework Mode is disabled, or if Declarative Mode (<BrowserRouter>) or Data Mode (createBrowserRouter/<RouterProvider>) is being used. This issue has been patched in @remix-run/react version 2.17.3 and react-router version 7.12.0.

Severity ?

8.2 (High)


                        
                          CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:L/A:N

CWE

CWE-79 - Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

Assigner

GitHub_M

References

URL

Tags

https://github.com/remix-run/react-router/securit…

x_refsource_CONFIRM

Impacted products

	Vendor	Product	Version
	remix-run	react-router	Affected: @remix-run/react < 2.17.3 Affected: react-router >= 7.0.0, < 7.12.0

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CERTFR-2026-AVI-0424

Vulnerability from certfr_avis - Published: 2026-04-10 - Updated: 2026-04-10

De multiples vulnérabilités ont été découvertes dans les produits IBM. Certaines d'entre elles permettent à un attaquant de provoquer une exécution de code arbitraire à distance, un déni de service à distance et une atteinte à la confidentialité des données.

Solutions

Se référer au bulletin de sécurité de l'éditeur pour l'obtention des correctifs (cf. section Documentation).

Impacted products

Vendor	Product	Description
IBM	Sterling	Sterling External Authentication Server versions 6.1.1.x antérieures à 6.1.1.3 GA
IBM	N/A	WebSphere Application Server Liberty versions 17.0.0.3 à 26.0.0.3 sans le correctif APAR PH70510
IBM	QRadar SIEM	QRadar AI Assistant pour QRadar SIEM versions antérieures à 1.4.0
IBM	Sterling	Sterling Secure Proxy versions 6.1.0.x antérieures à 6.1.0.4 GA
IBM	Sterling	Sterling Secure Proxy versions 6.2.1.x antérieures à 6.2.1.2 GA

References

Title

Publication Time

GHSA-8V8X-CX79-35W7

Vulnerability from github – Published: 2026-01-08 20:50 – Updated: 2026-01-11 14:54

Summary

React Router SSR XSS in ScrollRestoration

Details

A XSS vulnerability exists in in React Router's <ScrollRestoration> API in Framework Mode when using the getKey/storageKey props during Server-Side Rendering which could allow arbitrary JavaScript execution during SSR if untrusted content is used to generate the keys.

[!NOTE] This does not impact applications if developers have disabled server-side rendering in Framework Mode, or if they are using Declarative Mode (<BrowserRouter>) or Data Mode (createBrowserRouter/<RouterProvider>).

Severity ?

8.2 (High)


                  
                    CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:L/A:N

Show details on source website

JSON

To clipboard

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    "github_reviewed_at": "2026-01-08T20:50:05Z",
    "nvd_published_at": "2026-01-10T03:15:48Z",
    "severity": "HIGH"
  },
  "details": "A XSS vulnerability exists in in React Router\u0027s `\u003cScrollRestoration\u003e` API in [Framework Mode](https://reactrouter.com/start/modes#framework) when using the `getKey`/`storageKey` props during Server-Side Rendering which could allow arbitrary JavaScript execution during SSR if untrusted content is used to generate the keys.\n\n\u003e [!NOTE]\n\u003e This does not impact applications if developers have [disabled server-side rendering](https://reactrouter.com/how-to/spa) in Framework Mode, or if they are using [Declarative Mode](https://reactrouter.com/start/modes#declarative) (`\u003cBrowserRouter\u003e`) or [Data Mode](https://reactrouter.com/start/modes#data) (`createBrowserRouter`/`\u003cRouterProvider\u003e`).",
  "id": "GHSA-8v8x-cx79-35w7",
  "modified": "2026-01-11T14:54:08Z",
  "published": "2026-01-08T20:50:05Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/remix-run/react-router/security/advisories/GHSA-8v8x-cx79-35w7"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-21884"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/remix-run/react-router"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:L/A:N",
      "type": "CVSS_V3"
    }
  ],
  "summary": "React Router SSR XSS in ScrollRestoration"
}

FKIE_CVE-2026-21884

Vulnerability from fkie_nvd - Published: 2026-01-10 03:15 - Updated: 2026-06-30 03:17

Severity ?

8.2 (High) - CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:L/A:N
8.2 (High) - CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:L/A:N

Summary

References

URL	Tags
security-advisories@github.com	https://github.com/remix-run/react-router/security/advisories/GHSA-8v8x-cx79-35w7	Third Party Advisory
0b0ca135-0b70-47e7-9f44-1890c2a1c46c	https://access.redhat.com/errata/RHSA-2026:19712
0b0ca135-0b70-47e7-9f44-1890c2a1c46c	https://access.redhat.com/errata/RHSA-2026:3782
0b0ca135-0b70-47e7-9f44-1890c2a1c46c	https://access.redhat.com/errata/RHSA-2026:3958
0b0ca135-0b70-47e7-9f44-1890c2a1c46c	https://access.redhat.com/errata/RHSA-2026:3960
0b0ca135-0b70-47e7-9f44-1890c2a1c46c	https://access.redhat.com/security/cve/CVE-2026-21884
0b0ca135-0b70-47e7-9f44-1890c2a1c46c	https://bugzilla.redhat.com/show_bug.cgi?id=2428421
0b0ca135-0b70-47e7-9f44-1890c2a1c46c	https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-21884.json

Impacted products

	Vendor	Product	Version
	shopify	react-router	*
	shopify	remix-run\/react	*

JSON

To clipboard

{
  "affected": [
    {
      "affectedData": [
        {
          "product": "react-router",
          "vendor": "remix-run",
          "versions": [
            {
              "status": "affected",
              "version": "@remix-run/react \u003c 2.17.3"
            },
            {
              "status": "affected",
              "version": "react-router  \u003e= 7.0.0, \u003c 7.12.0"
            }
          ]
        }
      ],
      "source": "security-advisories@github.com"
    },
    {
      "affectedData": [
        {
          "cpes": [
            "cpe:/a:redhat:ansible_automation_platform:2.6::el9",
            "cpe:/a:redhat:ansible_automation_platform_developer:2.6::el9",
            "cpe:/a:redhat:ansible_automation_platform_inside:2.6::el9"
          ],
          "defaultStatus": "affected",
          "product": "Red Hat Ansible Automation Platform 2.6 for RHEL 9",
          "vendor": "Red Hat"
        },
        {
          "cpes": [
            "cpe:/a:redhat:ansible_automation_platform:2.6::el9"
          ],
          "defaultStatus": "affected",
          "product": "Red Hat Ansible Automation Platform 2.6",
          "vendor": "Red Hat"
        },
        {
          "cpes": [
            "cpe:/a:redhat:openshift_ai:2.25::el9"
          ],
          "defaultStatus": "affected",
          "product": "Red Hat OpenShift AI 2.25",
          "vendor": "Red Hat"
        },
        {
          "cpes": [
            "cpe:/a:redhat:openshift_ai:3.3::el9"
          ],
          "defaultStatus": "affected",
          "product": "Red Hat OpenShift AI 3.3",
          "vendor": "Red Hat"
        },
        {
          "cpes": [
            "cpe:/a:redhat:ansible_automation_platform:2.6::el10",
            "cpe:/a:redhat:ansible_automation_platform_developer:2.6::el10"
          ],
          "defaultStatus": "unaffected",
          "product": "Red Hat Ansible Automation Platform 2.6 for RHEL 10",
          "vendor": "Red Hat"
        },
        {
          "cpes": [
            "cpe:/a:redhat:kueue_operator:1"
          ],
          "defaultStatus": "unaffected",
          "product": "Red Hat Build of Kueue",
          "vendor": "Red Hat"
        },
        {
          "cpes": [
            "cpe:/o:redhat:enterprise_linux:10"
          ],
          "defaultStatus": "unaffected",
          "product": "Red Hat Enterprise Linux 10",
          "vendor": "Red Hat"
        },
        {
          "cpes": [
            "cpe:/o:redhat:enterprise_linux:9"
          ],
          "defaultStatus": "unaffected",
          "product": "Red Hat Enterprise Linux 9",
          "vendor": "Red Hat"
        }
      ],
      "source": "0b0ca135-0b70-47e7-9f44-1890c2a1c46c"
    }
  ],
  "configurations": [
    {
      "nodes": [
        {
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:a:shopify:react-router:*:*:*:*:*:node.js:*:*",
              "matchCriteriaId": "6928DE33-6137-4682-8610-1A6646F1B2A5",
              "versionEndIncluding": "7.11.0",
              "versionStartIncluding": "7.0.0",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:a:shopify:remix-run\\/react:*:*:*:*:*:node.js:*:*",
              "matchCriteriaId": "CD7006C4-2033-446C-A472-DAD51EB06396",
              "versionEndExcluding": "2.17.3",
              "vulnerable": true
            }
          ],
          "negate": false,
          "operator": "OR"
        }
      ]
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "React Router is a router for React. In @remix-run/react version prior to 2.17.3. and react-router 7.0.0 through 7.11.0, a XSS vulnerability exists in in React Router\u0027s \u003cScrollRestoration\u003e API in Framework Mode when using the getKey/storageKey props during Server-Side Rendering which could allow arbitrary JavaScript execution during SSR if untrusted content is used to generate the keys. There is no impact if server-side rendering in Framework Mode is disabled, or if Declarative Mode (\u003cBrowserRouter\u003e) or Data Mode (createBrowserRouter/\u003cRouterProvider\u003e) is being used. This issue has been patched in @remix-run/react version 2.17.3 and react-router version 7.12.0."
    },
    {
      "lang": "es",
      "value": "React Router es un router para React. En la versi\u00f3n de @remix-run/react anterior a la 2.17.3 y react-router de la 7.0.0 a la 7.11.0, existe una vulnerabilidad de XSS en la API  de React Router en Modo Framework al usar las props getKey/storageKey durante la Renderizaci\u00f3n del Lado del Servidor, lo que podr\u00eda permitir la ejecuci\u00f3n arbitraria de JavaScript durante SSR si se utiliza contenido no confiable para generar las claves. No hay impacto si la renderizaci\u00f3n del lado del servidor en Modo Framework est\u00e1 deshabilitada, o si se est\u00e1 utilizando el Modo Declarativo () o el Modo de Datos (createBrowserRouter/). Este problema ha sido parcheado en la versi\u00f3n 2.17.3 de @remix-run/react y la versi\u00f3n 7.12.0 de react-router."
    }
  ],
  "id": "CVE-2026-21884",
  "lastModified": "2026-06-30T03:17:25.203",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "NETWORK",
          "availabilityImpact": "NONE",
          "baseScore": 8.2,
          "baseSeverity": "HIGH",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "LOW",
          "privilegesRequired": "NONE",
          "scope": "CHANGED",
          "userInteraction": "REQUIRED",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:L/A:N",
          "version": "3.1"
        },
        "exploitabilityScore": 2.8,
        "impactScore": 4.7,
        "source": "security-advisories@github.com",
        "type": "Secondary"
      },
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "NETWORK",
          "availabilityImpact": "NONE",
          "baseScore": 8.2,
          "baseSeverity": "HIGH",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "LOW",
          "privilegesRequired": "NONE",
          "scope": "CHANGED",
          "userInteraction": "REQUIRED",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:L/A:N",
          "version": "3.1"
        },
        "exploitabilityScore": 2.8,
        "impactScore": 4.7,
        "source": "0b0ca135-0b70-47e7-9f44-1890c2a1c46c",
        "type": "Secondary"
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2026-21884",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "total"
            }
          ],
          "role": "CISA Coordinator",
          "timestamp": "2026-01-13T04:55:52.068631Z",
          "version": "2.0.3"
        }
      }
    ]
  },
  "published": "2026-01-10T03:15:48.673",
  "references": [
    {
      "source": "security-advisories@github.com",
      "tags": [
        "Third Party Advisory"
      ],
      "url": "https://github.com/remix-run/react-router/security/advisories/GHSA-8v8x-cx79-35w7"
    },
    {
      "source": "0b0ca135-0b70-47e7-9f44-1890c2a1c46c",
      "url": "https://access.redhat.com/errata/RHSA-2026:19712"
    },
    {
      "source": "0b0ca135-0b70-47e7-9f44-1890c2a1c46c",
      "url": "https://access.redhat.com/errata/RHSA-2026:3782"
    },
    {
      "source": "0b0ca135-0b70-47e7-9f44-1890c2a1c46c",
      "url": "https://access.redhat.com/errata/RHSA-2026:3958"
    },
    {
      "source": "0b0ca135-0b70-47e7-9f44-1890c2a1c46c",
      "url": "https://access.redhat.com/errata/RHSA-2026:3960"
    },
    {
      "source": "0b0ca135-0b70-47e7-9f44-1890c2a1c46c",
      "url": "https://access.redhat.com/security/cve/CVE-2026-21884"
    },
    {
      "source": "0b0ca135-0b70-47e7-9f44-1890c2a1c46c",
      "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2428421"
    },
    {
      "source": "0b0ca135-0b70-47e7-9f44-1890c2a1c46c",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-21884.json"
    }
  ],
  "sourceIdentifier": "security-advisories@github.com",
  "vulnStatus": "Modified",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-79"
        }
      ],
      "source": "security-advisories@github.com",
      "type": "Primary"
    },
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-79"
        }
      ],
      "source": "0b0ca135-0b70-47e7-9f44-1890c2a1c46c",
      "type": "Secondary"
    }
  ]
}

Sightings

Author	Source	Type	Date

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.

Action not permitted

CVE-2026-21884 (GCVE-0-2026-21884)

CERTFR-2026-AVI-0424

Solutions

GHSA-8V8X-CX79-35W7

FKIE_CVE-2026-21884

Tags

Sightings

Nomenclature