Apache Tomcat: HTTP/2 request headers not validated_CVE-2026-41293

{
    "lastseen": "",
    "description": "Improper Input Validation 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 9.0.0.M1 through 9.0.117, from 10.0.0-M1 through 10.0.27.\nOlder, end of support versions may also be affected.\n\nUsers are recommended to upgrade to version [FIXED_VERSION], which fixes the issue.",
    "published": "2026-05-12T15:19:35.179Z",
    "modified": "2026-05-14T19:54:07.534Z",
    "type": "cve",
    "title": "Apache Tomcat: HTTP/2 request headers not validated",
    "source": "apache",
    "references": "https://lists.apache.org/thread/qwg0q16z7xkb2qrr853wdll5531mvl1r",
    "id": "CVE-2026-41293",
    "bulletinFamily": "",
    "cwe": [
        "CWE-20"
    ],
    "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 9.0.0.M1\nApache Software Foundation Apache Tomcat 10.0.0-M1\nApache Software Foundation Apache Tomcat 8.5.0",
    "sourceHref": "",
    "cvss": {
        "score": 9.8,
        "severity": "CRITICAL",
        "vector": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
        "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": "Apache Tomcat is vulnerable to an Improper Input Validation vulnerability, allowing attackers to potentially exploit the system.",
    "ai_severity": "Critical",
    "ai_vendor": "Apache Software Foundation",
    "ai_product": "Apache Tomcat",
    "ai_version": "11.0.0-M1, 10.1.0-M1, 9.0.0.M1, 10.0.0-M1, 8.5.0",
    "ai_score": 9.8
}