https://cve.radiocsirt.org Contains only the most 10 recent entries. http://www.rssboard.org/rss-specification python-feedgen en Wed, 07 Oct 2026 05:45:22 +0000 https://cve.radiocsirt.org/vuln/cve-2026-39804 <p><strong>Affected:</strong> mtrudel bandit</p> <p>Allocation of Resources Without Limits or Throttling vulnerability in mtrudel bandit allows unauthenticated remote denial of service via memory exhaustion when WebSocket permessage-deflate compression is enabled.</p> <p>&#39;Elixir.Bandit.WebSocket.PerMessageDeflate&#39;:inflate/2 in lib/bandit/websocket/permessage_deflate.ex calls :zlib.inflate/2 with no output-size cap, then materializes the entire decompressed payload as a single binary via IO.iodata_to_binary/1. The websocket_options.max_frame_size option only bounds the on-the-wire (compressed) frame size, not the decompressed output. A high-ratio compressed frame (e.g. uniform data at ~1024:1 ratio) can stay well under any wire-size limit while forcing GiB-scale heap allocations in the connection process before any application code runs.</p> <p>An unauthenticated attacker who can open a WebSocket connection can send a single such frame to exhaust the BEAM node&#39;s memory and trigger an OOM kill.</p> <p>This vulnerability requires both Bandit&#39;s server-level websocket_options.compress and the per-upgrade compress: true option passed to WebSockAdapter.upgrade/4 to be enabled. Stock Phoenix and LiveView applications are not affected as they default to compress: false.</p> <p>This issue affects bandit: from 0.5.9 before 1.11.0.</p> <p><strong>Affected:</strong> mtrudel bandit</p> <p>Allocation of Resources Without Limits or Throttling vulnerability in mtrudel bandit allows unauthenticated remote denial of service via memory exhaustion when WebSocket permessage-deflate compression is enabled.</p> <p>&#39;Elixir.Bandit.WebSocket.PerMessageDeflate&#39;:inflate/2 in lib/bandit/websocket/permessage_deflate.ex calls :zlib.inflate/2 with no output-size cap, then materializes the entire decompressed payload as a single binary via IO.iodata_to_binary/1. The websocket_options.max_frame_size option only bounds the on-the-wire (compressed) frame size, not the decompressed output. A high-ratio compressed frame (e.g. uniform data at ~1024:1 ratio) can stay well under any wire-size limit while forcing GiB-scale heap allocations in the connection process before any application code runs.</p> <p>An unauthenticated attacker who can open a WebSocket connection can send a single such frame to exhaust the BEAM node&#39;s memory and trigger an OOM kill.</p> <p>This vulnerability requires both Bandit&#39;s server-level websocket_options.compress and the per-upgrade compress: true option passed to WebSockAdapter.upgrade/4 to be enabled. Stock Phoenix and LiveView applications are not affected as they default to compress: false.</p> <p>This issue affects bandit: from 0.5.9 before 1.11.0.</p> https://cve.radiocsirt.org/vuln/cve-2026-39804