AIOHTTP: HTTP request smuggling via WebSocket upgrade

TRUNG BÌNH 6.3CVE-2026-69243 · GHSA-mfx4-hv73-q22v · PYSEC-2026-3546 · Công bố 03/08/2026 · cập nhật 23/10/2026

Tóm tắt nhanh

CVE-2026-69243 là lỗ hổng mức TRUNG BÌNH (CVSS 6.3) ảnh hưởng aiohttp.
Xác suất bị khai thác trong 30 ngày tới (EPSS): 0.44%, cao hơn 38.5% các lỗ hổng khác.
Cách xử lý: cập nhật lên 3.14.2 hoặc mới hơn.

Gói / sản phẩm	Phiên bản bị ảnh hưởng	Phiên bản đã vá
aiohttp PyPI	`< 3.14.2`	`3.14.2`

Mô tả

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

Mô tả của NVD

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.