Allocation of Resources Without Limits or Throttling Affecting aiohttp package, versions [,3.14.4)
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- published19 Oct 2026
- disclosed19 Oct 2026
- creditMarkus Magnuson, Liem Luttrell, Axel Mierczuk, afldl, Syed Mohammad Ibrahim, Denys Pakizh, Rodrigo Nogueira
Introduced: 19 Oct 2026
New CVE NOT AVAILABLE CWE-770 (opens in a new tab)Common Weakness Enumeration (CWE) is a category system for software weaknesses
How to fix?
Upgrade aiohttp to version 3.14.4 or higher.
Overview
Affected versions of this package are vulnerable to Allocation of Resources Without Limits or Throttling via the WebSocket reader (aiohttp/_websocket/reader_py.py) accumulating an unbounded number of per-read payload fragments in memory. An attacker can send a large number of tiny WebSocket fragments, causing memory exhaustion and crashing the server process.