CVE-2026-13762CWE-444

HTTP/2 Stream Parser Confusion Body-Inspection Bypass in Amazon CloudFront with AWS WAF

High · published June 29, 2026

CVSS v4.0
7.9
EPSS
1%
Percentile
49.3
In the wild
Unconfirmed
What it is

Inconsistent interpretation of HTTP/2 requests in Amazon CloudFront 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 was remediated server-side. No customer action is required.

The record
Technical detail
CVSS v4.0
7.9 · HIGH
Vector
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
EPSS
0.00626 · 49.3th percentile
Weakness
CWE-444 · Inconsistent Interpretation of HTTP Requests ('HTTP Request/Response Smuggling')
Published
2026-06-29T20:03Z
EPSS history
Timeline
  • 29 JUN 20:03Z
    HTTP/2 Stream Parser Confusion Body-Inspection Bypass in Amazon CloudFront with AWS WAF
    cvelistv5