CVE-2026-123817GHSA-2g87-pp6c-29x5
AIOHTTP is an asynchronous HTTP client/server framework for asyncio and Python. Prior to 3.14.4, the WebSocket reader retains one bytes object for each transport read while reassembling an incomplete frame. A malicious peer can split a frame into many tiny reads so per-object overhead substantially exceeds the payload bytes allowed by max_msg_size. The condition affects a server receiving frames from a malicious client and a client receiving frames from a malicious server, and can cause excessive memory consumption or denial of service. This issue is fixed in version 3.14.4.
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| Product | Affected versions | Fixed in | Source |
|---|---|---|---|
| aiohttpPyPI | <= 3.14.3 | 3.14.4 | GitHub |
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First seen by Baba Yaga Security