GitHub Advisoryadvisory · PyPI

GHSA-69f9-5gxw-wvc2 AIOHTTP's unicode processing of header values could cause parsing discrepancies

LOW Published 2026-01-05 Modified 2026-01-06 Official page ↗
Aliases
CVE-2025-69224
Ecosystem
PyPI
Packages
aiohttp
Severity
Low
CVSS vector
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:U
Weaknesses
CWE-444
Reviewed
2026-01-05

Affected packages

• PyPI aiohttp: < 3.13.3 → fixed in 3.13.3

Description

Summary The Python HTTP parser may allow a request smuggling attack with the presence of non-ASCII characters. Impact If a pure Python version of aiohttp is installed (i.e. without the usual C extensions) or AIOHTTP_NO_EXTENSIONS is enabled, then an attacker may be able to execute a request smuggling attack to bypass certain firewalls or proxy protections. ------ Patch: https://github.com/aio-libs/aiohttp/commit/32677f2adfd907420c078dda6b79225c6f4ebce0

Related

Alias · CVE (1)

  • CVE-2025-69224 AIOHTTP is an asynchronous HTTP client/server framework for asyncio and Python. vulnerability

Weakness · CWE (1)

  • CWE-444 Inconsistent Interpretation of HTTP Requests weakness

References