CVE-2025-69224CWE-444

CVE-2025-69224

Medium · published January 6, 2026

CVSS v3.1
6.5
EPSS
0%
Percentile
15.5
In the wild
Unconfirmed
What it is

AIOHTTP is an asynchronous HTTP client/server framework for asyncio and Python. Versions 3.13.2 and below of the Python HTTP parser may allow a request smuggling attack with the presence of non-ASCII characters. 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. This issue is fixed in version 3.13.3.

The record
Technical detail
CVSS v3.1
6.5 · MEDIUM
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N
CVSS v4.0
Not supplied
EPSS
0.00250 · 15.5th percentile
Weakness
CWE-444 · Inconsistent Interpretation of HTTP Requests ('HTTP Request/Response Smuggling')
Published
2026-01-06T04:15Z
Affected products (1)
ProductVersionsFixed in
aiohttp/aiohttp< 3.13.33.13.3
References (2)
https://github.com/aio-libs/aiohttp/commit/32677f2adfd907420c078dda6b79225c6f4ebce0 · [email protected]https://github.com/aio-libs/aiohttp/security/advisories/GHSA-69f9-5gxw-wvc2 · [email protected]
EPSS history
Timeline
  • 05 JAN 22:35Z
    AIOHTTP's Unicode processing of header values could cause parsing discrepancies
    cvelistv5