{
    "id": "CVE-2026-45321",
    "published": "2026-05-12 01:16:46",
    "last_modified": "2026-06-17 10:51:54",
    "cvss_score": "9.6",
    "cvss_severity": "CRITICAL",
    "cvss_version": "3.1",
    "cvss_vector": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H",
    "cwe": "CWE-506",
    "description": "On 2026-05-11, between approximately 19:20 and 19:26 UTC, 84 malicious versions across 42 @tanstack/* packages were published to the npm registry. The publishes were authenticated via the legitimate GitHub Actions OIDC trusted-publisher binding for TanStack/router, but the publish workflow itself was not modified. The attacker chained three known vulnerability classes — a pull_request_target \"Pwn Request\" misconfiguration, GitHub Actions cache poisoning across the fork↔base trust boundary, and runtime memory extraction of the OIDC token from the Actions runner process — to publish credential-stealing malware under a trusted identity. Each affected package received exactly two malicious versions, published a few minutes apart.",
    "epss_score": "0.01054",
    "epss_percentile": "0.62980",
    "kev": 1,
    "kev_due": "2026-06-10",
    "has_exploit": 0,
    "updated_at": "2026-09-27 18:17:58",
    "priority": {
        "rank": 1,
        "label": "Patch first",
        "why": "On CISA KEV — known exploited in the wild, due 2026-06-10."
    },
    "products": [
        {
            "vendor": "tanstack",
            "product": "tanstack\\/arktype-adapter"
        },
        {
            "vendor": "tanstack",
            "product": "tanstack\\/eslint-plugin-router"
        },
        {
            "vendor": "tanstack",
            "product": "tanstack\\/eslint-plugin-start"
        },
        {
            "vendor": "tanstack",
            "product": "tanstack\\/history"
        },
        {
            "vendor": "tanstack",
            "product": "tanstack\\/nitro-v2-vite-plugin"
        },
        {
            "vendor": "tanstack",
            "product": "tanstack\\/react-router"
        },
        {
            "vendor": "tanstack",
            "product": "tanstack\\/react-router-devtools"
        },
        {
            "vendor": "tanstack",
            "product": "tanstack\\/react-router-ssr-query"
        },
        {
            "vendor": "tanstack",
            "product": "tanstack\\/react-start"
        },
        {
            "vendor": "tanstack",
            "product": "tanstack\\/react-start-client"
        },
        {
            "vendor": "tanstack",
            "product": "tanstack\\/react-start-rsc"
        },
        {
            "vendor": "tanstack",
            "product": "tanstack\\/react-start-server"
        },
        {
            "vendor": "tanstack",
            "product": "tanstack\\/router-cli"
        },
        {
            "vendor": "tanstack",
            "product": "tanstack\\/router-core"
        },
        {
            "vendor": "tanstack",
            "product": "tanstack\\/router-devtools"
        },
        {
            "vendor": "tanstack",
            "product": "tanstack\\/router-devtools-core"
        },
        {
            "vendor": "tanstack",
            "product": "tanstack\\/router-generator"
        },
        {
            "vendor": "tanstack",
            "product": "tanstack\\/router-plugin"
        },
        {
            "vendor": "tanstack",
            "product": "tanstack\\/router-ssr-query-core"
        },
        {
            "vendor": "tanstack",
            "product": "tanstack\\/router-utils"
        },
        {
            "vendor": "tanstack",
            "product": "tanstack\\/router-vite-plugin"
        },
        {
            "vendor": "tanstack",
            "product": "tanstack\\/solid-router"
        },
        {
            "vendor": "tanstack",
            "product": "tanstack\\/solid-router-devtools"
        },
        {
            "vendor": "tanstack",
            "product": "tanstack\\/solid-router-ssr-query"
        },
        {
            "vendor": "tanstack",
            "product": "tanstack\\/solid-start"
        },
        {
            "vendor": "tanstack",
            "product": "tanstack\\/solid-start-client"
        },
        {
            "vendor": "tanstack",
            "product": "tanstack\\/solid-start-server"
        },
        {
            "vendor": "tanstack",
            "product": "tanstack\\/start-client-core"
        },
        {
            "vendor": "tanstack",
            "product": "tanstack\\/start-fn-stubs"
        },
        {
            "vendor": "tanstack",
            "product": "tanstack\\/start-plugin-core"
        },
        {
            "vendor": "tanstack",
            "product": "tanstack\\/start-server-core"
        },
        {
            "vendor": "tanstack",
            "product": "tanstack\\/start-static-server-functions"
        },
        {
            "vendor": "tanstack",
            "product": "tanstack\\/start-storage-context"
        },
        {
            "vendor": "tanstack",
            "product": "tanstack\\/valibot-adapter"
        },
        {
            "vendor": "tanstack",
            "product": "tanstack\\/virtual-file-routes"
        },
        {
            "vendor": "tanstack",
            "product": "tanstack\\/vue-router"
        },
        {
            "vendor": "tanstack",
            "product": "tanstack\\/vue-router-devtools"
        },
        {
            "vendor": "tanstack",
            "product": "tanstack\\/vue-router-ssr-query"
        },
        {
            "vendor": "tanstack",
            "product": "tanstack\\/vue-start"
        },
        {
            "vendor": "tanstack",
            "product": "tanstack\\/vue-start-client"
        }
    ],
    "kev_detail": {
        "cve_id": "CVE-2026-45321",
        "date_added": "2026-05-27",
        "due_date": "2026-06-10",
        "vendor": "TanStack",
        "product": "TanStack",
        "name": "TanStack Unspecified Vulnerability",
        "ransomware": 1
    },
    "exploits": [],
    "refs_list": [
        "https://github.com/TanStack/router/issues/7383",
        "https://github.com/TanStack/router/security/advisories/GHSA-g7cv-rxg3-hmpx",
        "https://tanstack.com/blog/npm-supply-chain-compromise-postmortem",
        "https://www.stepsecurity.io/blog/mini-shai-hulud-is-back-a-self-spreading-supply-chain-attack-hits-the-npm-ecosystem",
        "https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-45321"
    ]
}