{
    "dataType": "CVE_RECORD",
    "dataVersion": "5.2",
    "cveMetadata": {
        "cveId": "CVE-2026-102989",
        "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
        "state": "PUBLISHED",
        "assignerShortName": "GitHub_M",
        "dateReserved": "2026-09-29T20:46:08.334Z",
        "datePublished": "2026-10-13T16:13:13.105Z",
        "dateUpdated": "2026-10-14T15:20:08.563Z"
    },
    "containers": {
        "cna": {
            "title": "TanStack Router: Unauthenticated reflected XSS in TanStack Start server-function responses",
            "problemTypes": [
                {
                    "descriptions": [
                        {
                            "cweId": "CWE-79",
                            "lang": "en",
                            "description": "CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')",
                            "type": "CWE"
                        }
                    ]
                }
            ],
            "metrics": [
                {
                    "cvssV3_1": {
                        "attackComplexity": "LOW",
                        "attackVector": "NETWORK",
                        "availabilityImpact": "NONE",
                        "baseScore": 9.3,
                        "baseSeverity": "CRITICAL",
                        "confidentialityImpact": "HIGH",
                        "integrityImpact": "HIGH",
                        "privilegesRequired": "NONE",
                        "scope": "CHANGED",
                        "userInteraction": "REQUIRED",
                        "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:N",
                        "version": "3.1"
                    }
                }
            ],
            "references": [
                {
                    "name": "https://github.com/TanStack/router/security/advisories/GHSA-qx66-fv34-fjm8",
                    "tags": [
                        "x_refsource_CONFIRM"
                    ],
                    "url": "https://github.com/TanStack/router/security/advisories/GHSA-qx66-fv34-fjm8"
                },
                {
                    "name": "https://github.com/TanStack/router/pull/8573",
                    "tags": [
                        "x_refsource_MISC"
                    ],
                    "url": "https://github.com/TanStack/router/pull/8573"
                },
                {
                    "name": "https://github.com/TanStack/router/commit/d521abd71c69f1ff010bb3def4d417cb5fa058cb",
                    "tags": [
                        "x_refsource_MISC"
                    ],
                    "url": "https://github.com/TanStack/router/commit/d521abd71c69f1ff010bb3def4d417cb5fa058cb"
                },
                {
                    "name": "https://github.com/TanStack/router/releases/tag/release-2026-09-30-1747",
                    "tags": [
                        "x_refsource_MISC"
                    ],
                    "url": "https://github.com/TanStack/router/releases/tag/release-2026-09-30-1747"
                }
            ],
            "affected": [
                {
                    "vendor": "TanStack",
                    "product": "router",
                    "versions": [
                        {
                            "version": "< release-2026-09-30-1747",
                            "status": "affected"
                        }
                    ]
                },
                {
                    "vendor": "@tanstack",
                    "product": "react-start",
                    "versions": [
                        {
                            "version": ">= 1.143.12, < 1.168.60",
                            "status": "affected"
                        }
                    ]
                },
                {
                    "vendor": "@tanstack",
                    "product": "solid-start",
                    "versions": [
                        {
                            "version": ">= 1.143.12, < 1.168.57",
                            "status": "affected"
                        }
                    ]
                },
                {
                    "vendor": "@tanstack",
                    "product": "start-server-core",
                    "versions": [
                        {
                            "version": ">= 1.143.12, < 1.169.39",
                            "status": "affected"
                        }
                    ]
                },
                {
                    "vendor": "@tanstack",
                    "product": "vue-start",
                    "versions": [
                        {
                            "version": ">= 1.143.12, < 1.168.56",
                            "status": "affected"
                        }
                    ]
                }
            ],
            "providerMetadata": {
                "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
                "shortName": "GitHub_M",
                "dateUpdated": "2026-10-13T16:13:13.105Z"
            },
            "descriptions": [
                {
                    "lang": "en",
                    "value": "TanStack Router is a client-first, server-capable, fully type-safe router and full-stack framework for the web. From 1.143.12 until 1.169.39 for @tanstack/start-server-core, 1.168.60 for @tanstack/react-start, 1.168.57 for @tanstack/solid-start, and 1.168.56 for @tanstack/vue-start, an unauthenticated attacker can place non-public fields in a server-function request payload so that attacker-controlled middleware state reaches the error path and a response-shaped object is accepted as an HTTP response. A crafted server-function URL can therefore return attacker-controlled HTML from the application's origin; when a visitor opens the URL, the injected script can access same-origin data and issue requests with the visitor's authority. This issue is fixed in @tanstack/start-server-core 1.169.39, @tanstack/react-start 1.168.60, @tanstack/solid-start 1.168.57, and @tanstack/vue-start 1.168.56."
                }
            ],
            "source": {
                "advisory": "GHSA-qx66-fv34-fjm8",
                "discovery": "UNKNOWN"
            }
        },
        "adp": [
            {
                "metrics": [
                    {
                        "other": {
                            "type": "ssvc",
                            "content": {
                                "timestamp": "2026-10-14T15:19:40.392223Z",
                                "id": "CVE-2026-102989",
                                "options": [
                                    {
                                        "Exploitation": "none"
                                    },
                                    {
                                        "Automatable": "no"
                                    },
                                    {
                                        "Technical Impact": "total"
                                    }
                                ],
                                "role": "CISA Coordinator",
                                "version": "2.0.3"
                            }
                        }
                    }
                ],
                "title": "CISA ADP Vulnrichment",
                "providerMetadata": {
                    "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
                    "shortName": "CISA-ADP",
                    "dateUpdated": "2026-10-14T15:20:08.563Z"
                }
            }
        ]
    }
}