PT-2026-67520 · Pypi · Aiohttp

CVE-2026-69243 · Published 2026-08-03 · Updated 2026-08-03

Positive Technologies (AI Summary)

CVSS v4.0

6.3

Medium

Base vector

AV:N/AC:H/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N

Name of the Vulnerable Software and Affected Versions AIOHTTP versions prior to 3.14.2

Description The HTTP parsers in the server-side component are susceptible to request smuggling during WebSocket upgrades. This occurs when a WebSocket upgrade request contains a body, causing the parser to switch protocols before the entire body is received. Consequently, trailing bytes are processed as upgraded-protocol or pipelined data instead of standard HTTP body data.

Recommendations Update to version 3.14.2.

Fix

HTTP Request/Response Smuggling

Weakness Enumeration

CWE-444

Related Identifiers

CVE-2026-69243

GHSA-MFX4-HV73-Q22V

Affected Products

Aiohttp

References · 7

• https://osv.dev/vulnerability/GHSA-mfx4-hv73-q22v · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2026-69243 · Security Note
• https://github.com/aio-libs/aiohttp/commit/6ae358f0983c3f4d6f67692b2f8e65dc8e091c98 · Note
• https://github.com/aio-libs/aiohttp/security/advisories/GHSA-mfx4-hv73-q22v · Note
• https://github.com/aio-libs/aiohttp/pull/13017 · Note
• https://github.com/aio-libs/aiohttp/releases/tag/v3.14.2 · Note
• https://github.com/aio-libs/aiohttp · Note