urllib3: Sensitive headers forwarded across origins in proxied low-level redirects_CVE-2026-44431

{
    "lastseen": "",
    "description": "urllib3 is an HTTP client library for Python. From 1.23 to before 2.7.0, cross-origin redirects followed from the low-level API via ProxyManager.connection_from_url().urlopen(..., assert_same_host=False) still forward these sensitive headers. This vulnerability is fixed in 2.7.0.",
    "published": "2026-05-13T15:20:24.588Z",
    "modified": "2026-05-13T17:17:07.339Z",
    "type": "cve",
    "title": "urllib3: Sensitive headers forwarded across origins in proxied low-level redirects",
    "source": "GitHub_M",
    "references": "https://github.com/urllib3/urllib3/security/advisories/GHSA-qccp-gfcp-xxvc",
    "id": "CVE-2026-44431",
    "bulletinFamily": "",
    "cwe": [
        "CWE-200"
    ],
    "cvelist": null,
    "sourceData": "urllib3 urllib3 >= 1.23, < 2.7.0",
    "sourceHref": "",
    "cvss": {
        "score": 8.2,
        "severity": "HIGH",
        "vector": "CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N",
        "version": "4.0"
    },
    "cvss2": [],
    "cvss3": {
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        "vectorString": "",
        "baseScore": 0,
        "baseSeverity": "",
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        "attackComplexity": "",
        "privilegesRequired": "",
        "userInteraction": "",
        "scope": "",
        "confidentialityImpact": "",
        "integrityImpact": "",
        "availabilityImpact": "",
        "cvssV3": {
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    },
    "href": "",
    "category_name": "CVE",
    "post_link": "",
    "product": "urllib3",
    "version": ">= 1.23, < 2.7.0",
    "vendor": "urllib3",
    "ai_description": "",
    "ai_severity": "",
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    "ai_score": 0
}