CVE-2025-69224 — HTTP Request Smuggling in Aiohttp

CWE-444 — HTTP Request Smuggling10 documents8 sources
Severity
6.3MEDIUMNVD
EPSS
0.0%
top 86.83%
CISA KEV
Not in KEV
Exploit
No known exploits
Affected products
2
Aio-libs AiohttpAiohttp
Timeline
PublishedJan 5
Latest updateFeb 13

Description

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.

CVSS vector

CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N

Affected Packages3 packages

▶NVDaiohttp/aiohttp< 3.13.3
▶PyPIaiohttp/aiohttp< 3.13.3
▶CVEListV5aio-libs/aiohttp< 3.13.3

Patches

Patch: github.com ↗Patch: github.com ↗

🔴Vulnerability Details

5
OSV
python-aiohttp vulnerabilities↗2026-02-13
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CVEList
AIOHTTP's Unicode processing of header values could cause parsing discrepancies↗2026-01-05
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OSV
CVE-2025-69224: AIOHTTP is an asynchronous HTTP client/server framework for asyncio and Python↗2026-01-05
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GHSA
AIOHTTP's unicode processing of header values could cause parsing discrepancies↗2026-01-05
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OSV
AIOHTTP's unicode processing of header values could cause parsing discrepancies↗2026-01-05
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📋Vendor Advisories

3
Ubuntu
AIOHTTP vulnerabilities↗2026-02-13
▶
Red Hat
aiohttp: aiohttp: Request smuggling via non-ASCII characters in HTTP parser↗2026-01-05
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Debian
CVE-2025-69224: python-aiohttp - AIOHTTP is an asynchronous HTTP client/server framework for asyncio and Python. ...↗2025
▶

🕵️Threat Intelligence

1
Wiz
CVE-2025-69224 Impact, Exploitability, and Mitigation Steps | Wiz↗
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CVE-2025-69224 — HTTP Request Smuggling in Aiohttp | cvebase