https://db.gcve.eu Contains only the most 10 recent entries. http://www.rssboard.org/rss-specification python-feedgen en Thu, 01 Oct 2026 13:36:35 +0000 https://db.gcve.eu/vuln/ghsa-vrm6-8vpv-qv8q <p><strong>Affected:</strong> npm: undici</p> <p>## Description</p> <p>The undici WebSocket client is vulnerable to a denial-of-service attack via unbounded memory consumption during permessage-deflate decompression. When a WebSocket connection negotiates the permessage-deflate extension, the client decompresses incoming compressed frames without enforcing any limit on the decompressed data size. A malicious WebSocket server can send a small compressed frame (a &#34;decompression bomb&#34;) that expands to an extremely large size in memory, causing the Node.js process to exhaust available memory and crash or become unresponsive.</p> <p>The vulnerability exists in the `PerMessageDeflate.decompress()` method, which accumulates all decompressed chunks in memory and concatenates them into a single Buffer without checking whether the total size exceeds a safe threshold.</p> <p>## Impact</p> <p>- Remote denial of service against any Node.js application using undici&#39;s WebSocket client - A single compressed WebSocket frame of ~6 MB can decompress to ~1 GB or more - Memory exhaustion occurs in native/external memory, bypassing V8 heap limits - No application-level mitigation is possible as decompression occurs before message delivery</p> <p>### Patches</p> <p>Users should upgrade to fixed versions.</p> <p>### Workarounds</p> <p>No workaround are possible.</p> <p><strong>Affected:</strong> npm: undici</p> <p>## Description</p> <p>The undici WebSocket client is vulnerable to a denial-of-service attack via unbounded memory consumption during permessage-deflate decompression. When a WebSocket connection negotiates the permessage-deflate extension, the client decompresses incoming compressed frames without enforcing any limit on the decompressed data size. A malicious WebSocket server can send a small compressed frame (a &#34;decompression bomb&#34;) that expands to an extremely large size in memory, causing the Node.js process to exhaust available memory and crash or become unresponsive.</p> <p>The vulnerability exists in the `PerMessageDeflate.decompress()` method, which accumulates all decompressed chunks in memory and concatenates them into a single Buffer without checking whether the total size exceeds a safe threshold.</p> <p>## Impact</p> <p>- Remote denial of service against any Node.js application using undici&#39;s WebSocket client - A single compressed WebSocket frame of ~6 MB can decompress to ~1 GB or more - Memory exhaustion occurs in native/external memory, bypassing V8 heap limits - No application-level mitigation is possible as decompression occurs before message delivery</p> <p>### Patches</p> <p>Users should upgrade to fixed versions.</p> <p>### Workarounds</p> <p>No workaround are possible.</p> https://db.gcve.eu/vuln/ghsa-vrm6-8vpv-qv8q