Kiota abstractions RedirectHandler leaks Cookie/Proxy-Authorization headers on cross-host redirect_CVE-2026-44503

{
    "lastseen": "",
    "description": "The RedirectHandler middleware in microsoft/kiota-java (com.microsoft.kiota:microsoft-kiota-http-okHttp v1.9.0) and other Kiota libraries fails to strip sensitive HTTP headers when following 3xx redirects to a different host or scheme. Only the Authorization header is removed; Cookie, Proxy-Authorization, and all custom headers are forwarded to the redirect target.",
    "published": "2026-05-14T15:58:57.772Z",
    "modified": "2026-05-14T15:58:57.772Z",
    "type": "cve",
    "title": "Kiota abstractions RedirectHandler leaks Cookie/Proxy-Authorization headers on cross-host redirect",
    "source": "GitHub_M",
    "references": "https://github.com/microsoft/kiota-java/security/advisories/GHSA-7j59-v9qr-6fq9",
    "id": "CVE-2026-44503",
    "bulletinFamily": "",
    "cwe": [
        "CWE-601"
    ],
    "cvelist": null,
    "sourceData": "microsoft kiota-java < 1.9.1\nmicrosoft Microsoft.Kiota.Abstractions < 1.22.0\nmicrosoft github.com/microsoft/kiota-http-go < 1.5.5\nmicrosoft kiota-typescript < 1.0.0-preview.100\nmicrosoft microsoft-kiota-abstractions < 1.9.1\nmicrosoft microsoft-kiota-http < 1.9.9",
    "sourceHref": "",
    "cvss": {
        "score": 7,
        "severity": "HIGH",
        "vector": "CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:H/VI:N/VA:N/SC:H/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,
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        }
    },
    "href": "",
    "category_name": "CVE",
    "post_link": "",
    "product": "kiota-java",
    "version": "< 1.9.1",
    "vendor": "microsoft",
    "ai_description": "",
    "ai_severity": "",
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    "ai_score": 0
}