Vulnerability Details CVE-2026-13763
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.
To 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 )
Exploit prediction scoring system (EPSS) score
EPSS Score 0.005
EPSS Ranking 39.0%
CVSS Severity
CVSS v3 Score 9.8
References
Products affected by CVE-2026-13763
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cpe:2.3:a:amazon:application_load_balancer:-