Threats Tagged 'cve-2026-42786'
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Threats Tagged 'cve-2026-42786'
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CVE-2026-42786: CWE-770 Allocation of Resources Without Limits or Throttling in mtrudel banditCVE-2026-42786 0 Allocation of Resources Without Limits or Throttling vulnerability in mtrudel bandit allows unauthenticated remote denial of service via memory exhaustion. The fragment reassembly path in 'Elixir.Bandit.WebSocket.Connection':handle_frame/3 in lib/bandit/websocket/connection.ex appends every incoming Continuation{fin: false} frame's payload to a per-connection iolist with no cumulative size cap. The existing max_frame_size option only bounds individual frames; a peer that streams an unbounded number of continuation frames without ever setting fin=1 grows BEAM heap linearly until the OS or a supervisor kills the process. Because the accumulation happens before WebSock.handle_in/2 is called, the application has no opportunity to interpose a size check. Phoenix Channels and LiveView both run over WebSock on Bandit, so a stock Phoenix application exposes this surface as soon as it accepts socket connections. This issue affects bandit: from 0.5.0 before 1.11.0. Join the discussion | CVE Database V5 | 05/01/2026, 20:34:17 UTC Added: 05/01/2026, 20:51:23 UTC |
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