SunandM/poc-h2-CVE-2026-71554 — GitHub trending stats & insights | Trendshift

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SunandM/poc-h2-CVE-2026-71554 — GitHub trending stats & insights | Trendshift

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SunandM/poc-h2-CVE-2026-71554

PoC for CVE-2026-71554 - h2 duplicate Host header request smuggling primitive (fixed in 4.4.1)

Python

1

2 contributors

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Finally, my first CVE got assigned CVE-2026-71554 h2 ≤4.4.0 (pure-Python HTTP/2 stack) accepts duplicate Host headers and forwards all of them downstream. When HTTP/2 is downgraded to HTTP/1.1 this…

@Crypt0_b0y · x.com

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