CVE-2026-54274Medium▾ Sunlitaiohttp: Incomplete websocket frame payloads bypass memory limits
▾ Sunlit zone — Low / medium · no exploitation signal
impact 27.5 · likelihood 0.1 · exploitation 0
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Exploit-prediction probability, daily snapshots since Jul 7.
Disclosure to exploitation, from the record and what we observed since indexing it.
Disclosed via OSV
0.3%
Last analysed / modified upstream
If an attacker sends large incomplete websocket frame payloads, it may be possible to bypass the usual size limits on memory use.
If a web application has WebSocket endpoints, it may be possible for an attacker to execute a DoS attack through excessive memory use.
Patch: https://github.com/aio-libs/aiohttp/commit/14b6ee851fb16ec199acb950de0c82d476799e7d
aiohttp < 3.14.1Upgrade to a patched release:
aiohttp 3.14.1Connected by shared product, vendor, weakness, or advisory.
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