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CVE-2026-13763

CRITICAL
9.8
CVSS 3.1
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. 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 )

Metadata

CVE ID
CVE-2026-13763
State
PUBLISHED
Assigner
AMZN
Reserved
2026-06-29 18:29 UTC
Published
2026-06-29 20:03 UTC
Last updated
2026-06-29 20:50 UTC
Primary CWE
CWE-444
CWE-444 Inconsistent interpretation of HTTP requests ('HTTP …
Vendor / Product
AWS / AWS Application Load Balancer
Sources
cve.org  ·  NVD

Severity & Metrics

9.8 CRITICAL CVSS 3.1
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
SSVC — CISA Coordinator
Exploitation
none
Automatable
yes
Tech. Impact
total
Affected products (1)
VendorProductPlatformVersions
AWS AWS Application Load Balancer — —
Weakness (CWE)
CWESourceDescription
CWE-444 cna CWE-444 Inconsistent interpretation of HTTP requests ('HTTP Request/Response smuggling')
CVSS scores (2)
ScoreSeverityVersionSourceVector
9.8 CRITICAL 3.1 cna CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
7.9 HIGH 4.0 cna CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:N/SC:H/SI:H/SA:H
References (2)
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