Apache Tomcat: WebSocket authentication header exposure_CVE-2026-42498

{
    "lastseen": "",
    "description": "Exposure of HTTP Authentication Header to unexpected hosts during WebSocket authentication vulnerability in Apache Tomcat.\n\nThis issue affects Apache Tomcat: from 11.0.0-M1 through 11.0.21, from 10.1.0-M1 through 10.1.54, from 9.0.2 through 9.0.117, from 8.5.24 through 8.5.100, from 7.0.83 through 7.0.109.\n\nUsers are recommended to upgrade to version 11.0.22, 10.1.55 or 9.0.118, which fix the issue.",
    "published": "2026-05-12T15:17:56.531Z",
    "modified": "2026-05-13T15:59:04.361Z",
    "type": "cve",
    "title": "Apache Tomcat: WebSocket authentication header exposure",
    "source": "apache",
    "references": "https://lists.apache.org/thread/n61zwf75jrv09rz90j4jssncm244bwdb",
    "id": "CVE-2026-42498",
    "bulletinFamily": "",
    "cwe": [
        "CWE-200"
    ],
    "cvelist": null,
    "sourceData": "Apache Software Foundation Apache Tomcat 11.0.0-M1\nApache Software Foundation Apache Tomcat 10.1.0-M1\nApache Software Foundation Apache Tomcat 9.0.2\nApache Software Foundation Apache Tomcat 8.5.24\nApache Software Foundation Apache Tomcat 7.0.83",
    "sourceHref": "",
    "cvss": {
        "score": 7.3,
        "severity": "HIGH",
        "vector": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L",
        "version": "3.1"
    },
    "cvss2": [],
    "cvss3": {
        "version": "",
        "vectorString": "",
        "baseScore": 0,
        "baseSeverity": "",
        "attackVector": "",
        "attackComplexity": "",
        "privilegesRequired": "",
        "userInteraction": "",
        "scope": "",
        "confidentialityImpact": "",
        "integrityImpact": "",
        "availabilityImpact": "",
        "cvssV3": {
            "version": "",
            "vectorString": "",
            "baseScore": 0,
            "baseSeverity": "",
            "attackVector": "",
            "attackComplexity": "",
            "privilegesRequired": "",
            "userInteraction": "",
            "scope": "",
            "confidentialityImpact": "",
            "integrityImpact": "",
            "availabilityImpact": ""
        }
    },
    "href": "",
    "category_name": "CVE",
    "post_link": "",
    "product": "Apache Tomcat",
    "version": "11.0.0-M1",
    "vendor": "Apache Software Foundation",
    "ai_description": "",
    "ai_severity": "",
    "ai_vendor": "",
    "ai_product": "",
    "ai_version": "",
    "ai_score": 0
}