CVE-2026-69243

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 WebSocket upgrades. If using the server-side component, an attacker may be able to execute a request smuggling vulnerability using an edge case in the WebSocket upgrade procedure. A WebSocket upgrade request with a body could cause the parser to switch protocols before the complete request body was received, leaving trailing bytes to be handled as upgraded-protocol or pipelined data rather than normal HTTP body data. This issue is fixed in version 3.14.2.

CVSS

No CVSS.

References

Link	Resource
https://github.com/aio-libs/aiohttp/commit/6ae358f0983c3f4d6f67692b2f8e65dc8e091c98
https://github.com/aio-libs/aiohttp/pull/13017
https://github.com/aio-libs/aiohttp/releases/tag/v3.14.2
https://github.com/aio-libs/aiohttp/security/advisories/GHSA-mfx4-hv73-q22v

Configurations

No configuration.

History

No history.

Information

Published : 2026-08-03 21:16

Updated : 2026-09-10 20:36

NVD link : CVE-2026-69243

Mitre link : CVE-2026-69243

CVE.ORG link : CVE-2026-69243

JSON object : View

Products Affected

No product.

CWE

CWE-444

Inconsistent Interpretation of HTTP Requests ('HTTP Request/Response Smuggling')

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