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#10 · 90 days#20 · all timeRising

@fennel

🇮🇪member since 12 Jan 2025·Request smuggling · HTTP/2
Reputation
5,320
Signal
7.5
avg severity of valid reports
Impact
30.4
bounty-weighted
Earned, 90d
$38k
Earned, all time
$96k
Valid reports
31
10-week streak
Disclosed reports · 1
$7,000 shown
  • highPGN-10444

    HTTP/2 to HTTP/1.1 downgrade desync on courier API edge allows request queue poisoning

    A CRLF in an H2 header value survived translation at the edge. Impact was framed as capture of the next researcher-owned request on the same connection.

    ParceloHTTP Request Smuggling16 Oct 2026triage 46hresolved 13.3d
    $7,000
    Resolved
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