AIOHTTP: HTTP request smuggling via WebSocket upgrade
### Summary The HTTP parsers were vulnerable to a request smuggling attack relating to WebSocket upgrades. ### Impact If using the server-side component, it may be possible for an attacker to execute a request smuggling vulnerability using an edge case in the WebSocket upgrade procedure. AIOHTT is unaware of any public exploit code. --- Patch: https://github.com/aio-libs/aiohttp/commit/6ae358f0983c3f4d6f67692b2f8e65dc8e091c98
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describes (1)
Related CVEs.
| ID | severity | exploitable | ||
|---|---|---|---|---|
| CVE-2026-69243US | — | Exploit | ||
AIOHTTP is an asynchronous HTTP client/server framework for asyncio and Python. Prior to 3.14.2, the HTTP parsers were vulnerable to a request smuggling attack relating to WebSocke… | ||||
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references
External citations — patches, advisories, analysis.
- https://github.com/advisories/GHSA-mfx4-hv73-q22vADVISORY
- https://github.com/aio-libs/aiohttpPACKAGE
- https://github.com/aio-libs/aiohttp/commit/6ae358f0983c3f4d6f67692b2f8e65dc8e091c98WEB
- https://github.com/aio-libs/aiohttp/pull/13017WEB
- https://github.com/aio-libs/aiohttp/releases/tag/v3.14.2WEB
- https://github.com/aio-libs/aiohttp/security/advisories/GHSA-mfx4-hv73-q22vWEB
- https://nvd.nist.gov/vuln/detail/CVE-2026-69243ADVISORY
- https://pypi.org/project/aiohttpPACKAGE
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