CVE-2026-128132
AIOHTTP: WebSocket receive queue limits bypassed by small or compressed messages
CVSS Score
0.0
EPSS Score
0.0%
EPSS Percentile
0th
AIOHTTP is an asynchronous HTTP client/server framework for asyncio and Python. Prior to 3.14.4, the WebSocket reader continues parsing frames already received after the receive queue pauses the transport, and empty messages are not counted toward the queue size. With permessage-deflate, one read of compressed frames can add many megabytes of decompressed messages to the receive queue. A remote peer can send many small or compressed messages faster than the application consumes them and cause excessive memory use in a server or client. This issue is fixed in version 3.14.4.
| CWE | CWE-400 CWE-770 |
| Vendor | aio-libs |
| Product | aiohttp |
| Published | Nov 13, 2026 |
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Affected Versions
aio-libs / aiohttp
< 3.14.4
References
github.com: https://github.com/aio-libs/aiohttp/security/advisories/GHSA-5rmc-48h2-hvcm github.com: https://github.com/aio-libs/aiohttp/pull/13393 github.com: https://github.com/aio-libs/aiohttp/pull/13545 github.com: https://github.com/aio-libs/aiohttp/pull/13546 github.com: https://github.com/aio-libs/aiohttp/commit/0ae507423f681161efa77d20052b4054397c7fb6 github.com: https://github.com/aio-libs/aiohttp/commit/5e54037933fa8422be5fa8a2002d118ed2d4e5e0 github.com: https://github.com/aio-libs/aiohttp/commit/b62321b6fa264a89f4aca084ad60fc38a59ffa51 github.com: https://github.com/aio-libs/aiohttp/releases/tag/v3.14.4