AIKIDO-2026-725081
aiohttp is vulnerable to Improper Input Validation
37
Low Risk
This Affects:
aiohttpTL;DR
The WebSocket client accepts and decompresses frames that have the RSV1 (compressed) bit set even when the permessage-deflate extension was not negotiated. A peer can therefore force decompression of frames on a connection where compression was explicitly opted out. This can cause additional CPU and memory consumption while inflating attacker-supplied payloads. The fix rejects compressed frames when permessage-deflate was not negotiated.
Who does this affect?
You are affected if you are using a version that falls within the vulnerable range.
Background info
aiohttp is vulnerable to Improper Input Validation in versions 0.0.1 - 3.14.1.
How to fix this
Upgrade the aiohttp library to the patch version.
Links
GitHub Release
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