follow-redirects: Custom Authentication Headers Leaked to Cross-Domain Redirect Targets_CVE-2026-40895

{
    "lastseen": "",
    "description": "follow-redirects is an open source, drop-in replacement for Node's `http` and `https` modules that automatically follows redirects. Prior to 1.16.0, when an HTTP request follows a cross-domain redirect (301/302/307/308), follow-redirects only strips authorization, proxy-authorization, and cookie headers (matched by regex at index.js). Any custom authentication header (e.g., X-API-Key, X-Auth-Token, Api-Key, Token) is forwarded verbatim to the redirect target. This vulnerability is fixed in 1.16.0.",
    "published": "2026-04-21T19:59:59.759Z",
    "modified": "2026-04-21T19:59:59.759Z",
    "type": "cve",
    "title": "follow-redirects: Custom Authentication Headers Leaked to Cross-Domain Redirect Targets",
    "source": "GitHub_M",
    "references": "https://github.com/follow-redirects/follow-redirects/security/advisories/GHSA-r4q5-vmmm-2653",
    "id": "CVE-2026-40895",
    "bulletinFamily": "",
    "cwe": [
        "CWE-200"
    ],
    "cvelist": null,
    "sourceData": "follow-redirects follow-redirects < 1.16.0",
    "sourceHref": "",
    "cvss": {
        "score": 6.9,
        "severity": "MEDIUM",
        "vector": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N",
        "version": "4.0"
    },
    "cvss2": [],
    "cvss3": {
        "version": "",
        "vectorString": "",
        "baseScore": 0,
        "baseSeverity": "",
        "attackVector": "",
        "attackComplexity": "",
        "privilegesRequired": "",
        "userInteraction": "",
        "scope": "",
        "confidentialityImpact": "",
        "integrityImpact": "",
        "availabilityImpact": "",
        "cvssV3": {
            "version": "",
            "vectorString": "",
            "baseScore": 0,
            "baseSeverity": "",
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        }
    },
    "href": "",
    "category_name": "CVE",
    "post_link": "",
    "product": "follow-redirects",
    "version": "< 1.16.0",
    "vendor": "follow-redirects",
    "ai_description": "",
    "ai_severity": "",
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    "ai_product": "",
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    "ai_score": 0
}