frp: Authentication bypass in frp HTTP vhost routing when routeByHTTPUser is used for access control_CVE-2026-40910

{
    "lastseen": "",
    "description": "frp is a fast reverse proxy. From 0.43.0 to 0.68.0, frp contains an authentication bypass in the HTTP vhost routing path when routeByHTTPUser is used as part of access control. In proxy-style requests, the routing logic uses the username from Proxy-Authorization to select the routeByHTTPUser backend, while the access control check uses credentials from the regular Authorization header. As a result, an attacker who can reach the HTTP vhost entrypoint and knows or can guess the protected routeByHTTPUser value may access a backend protected by httpUser / httpPassword even with an incorrect Proxy-Authorization password. This issue affects deployments that explicitly use routeByHTTPUser. It does not affect ordinary HTTP proxies that do not use this feature. This vulnerability is fixed in 0.68.1.",
    "published": "2026-04-21T20:09:00.893Z",
    "modified": "2026-04-21T20:28:48.579Z",
    "type": "cve",
    "title": "frp: Authentication bypass in frp HTTP vhost routing when routeByHTTPUser is used for access control",
    "source": "GitHub_M",
    "references": "https://github.com/fatedier/frp/security/advisories/GHSA-pq96-pwvg-vrr9",
    "id": "CVE-2026-40910",
    "bulletinFamily": "",
    "cwe": [
        "CWE-287"
    ],
    "cvelist": null,
    "sourceData": "fatedier frp < 0.68.1",
    "sourceHref": "",
    "cvss": {
        "score": 6.5,
        "severity": "MEDIUM",
        "vector": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:L/A:N",
        "version": "3.1"
    },
    "cvss2": [],
    "cvss3": {
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        "baseScore": 0,
        "baseSeverity": "",
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        "privilegesRequired": "",
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        "scope": "",
        "confidentialityImpact": "",
        "integrityImpact": "",
        "availabilityImpact": "",
        "cvssV3": {
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    },
    "href": "",
    "category_name": "CVE",
    "post_link": "",
    "product": "frp",
    "version": "< 0.68.1",
    "vendor": "fatedier",
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    "ai_score": 0
}