Threats Tagged 'cve-2026-48743'
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Threats Tagged 'cve-2026-48743'
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CVE-2026-48743: CWE-444: Inconsistent Interpretation of HTTP Requests ('HTTP Request/Response Smuggling') in envoyproxy envoyCVE-2026-48743 0 Envoy is an open source edge and service proxy designed for cloud-native applications. Prior to 1.35.11, 1.36.7, 1.37.3, and 1.38.1, Envoy can translate a downstream HTTP/3 request that is complete at the transport layer (HEADERS with FIN / headers-only close) but still carries a nonzero Content-Length into a complete upstream HTTP/1 request with unresolved body debt. In an HTTP/1 upstream deployment where the origin replies before reading the declared body and keeps the connection reusable, the beginning of the next Envoy-generated upstream request can be consumed as the first request's body. The remaining bytes are then parsed by the origin as a new HTTP/1 request. This was reproduced as a route-bypass/desync: direct /pwn was denied by Envoy, but the second downstream H3 stream received the response for backend-parsed GET /pwn HTTP/1.1. This vulnerability is fixed in 1.35.11, 1.36.7, 1.37.3, and 1.38.1. Join the discussion | CVE Database V5 | 06/26/2026, 17:34:22 UTC Added: 06/26/2026, 18:12:32 UTC |
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