HTTP/2 Stream Parser Confusion Body-Inspection Bypass in AWS Application Load Balancer with AWS WAF_CVE-2026-13763

{
    "lastseen": "",
    "description": "Inconsistent interpretation of HTTP/2 requests in AWS Application Load Balancer with AWS WAF enabled might allow remote actors to bypass AWS WAF managed rule body inspection via crafted HTTP/2 requests that fragment the request body across frames so that only a partial body is inspected. This issue only impacts HTTP/2 ALB target groups.\n\n\n\nTo remediate this issue, customers should enable the \"Inspect after sufficient data\" target group configuration associated to an ALB load balancer. Refer to: ( https://docs.aws.amazon.com/elasticloadbalancing/latest/application/edit-target-group-attributes.html#waf-http2-inspection )",
    "published": "2026-06-29T20:03:57.699Z",
    "modified": "2026-06-29T20:03:57.699Z",
    "type": "cve",
    "title": "HTTP/2 Stream Parser Confusion Body-Inspection Bypass in AWS Application Load Balancer with AWS WAF",
    "source": "AMZN",
    "references": "https://docs.aws.amazon.com/elasticloadbalancing/latest/application/edit-target-group-attributes.html#waf-http2-inspection\nhttps://aws.amazon.com/security/security-bulletins/2026-048-aws/",
    "id": "CVE-2026-13763",
    "bulletinFamily": "",
    "cwe": [
        "CWE-444"
    ],
    "cvelist": null,
    "sourceData": "AWS AWS Application Load Balancer 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": "",
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            "privilegesRequired": "",
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            "confidentialityImpact": "",
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        }
    },
    "href": "",
    "category_name": "CVE",
    "post_link": "",
    "product": "AWS Application Load Balancer",
    "version": "0",
    "vendor": "AWS",
    "ai_description": "HTTP/2 Stream Parser Confusion Body-Inspection Bypass vulnerability in AWS Application Load Balancer with AWS WAF enabled, allowing remote actors to bypass AWS WAF managed rule body inspection via crafted HTTP/2 requests",
    "ai_severity": "Critical",
    "ai_vendor": "Amazon Web Services (AWS)",
    "ai_product": "AWS Application Load Balancer",
    "ai_version": "0",
    "ai_score": 9.8
}