Haproxy โ€” PoC Archivehttps://poc.intelseclab.com/tags/haproxy/Latest proof-of-concept entries.Hugoen-usSun, 05 Jul 2026 00:00:00 +0000HAProxy HTTP/3 (QUIC) Standalone FIN Body Validation Bypass Leading to Request Smuggling โ€” CVE-2026-33555https://poc.intelseclab.com/pocs/network/2026-07-05_cve-2026-33555-haproxy-h3-request-smuggling/Sun, 05 Jul 2026 00:00:00 +0000https://poc.intelseclab.com/pocs/network/2026-07-05_cve-2026-33555-haproxy-h3-request-smuggling/High severity โ€” network ยท CVE-2026-33555. Status: PoC. Affects: HAProxy with HTTP/3 (QUIC) support built (USE_QUIC=1); tested on HAProxy 3.0.18. Tags: haproxy, http3, quic, request-smuggling, http-reuse, content-length, reverse-proxy, cross-user.networkHighhaproxyhttp3quicrequest-smugglinghttp-reusecontent-lengthreverse-proxycross-user