CVE-2025-69225 — HTTP Request Smuggling in Aiohttp

CWE-444 — HTTP Request Smuggling10 documents8 sources
Severity
2.7LOWNVD
EPSS
0.0%
top 86.16%
CISA KEV
Not in KEV
Exploit
No known exploits
Affected products
2
Aio-libs AiohttpAiohttp
Timeline
PublishedJan 6
Latest updateFeb 13

Description

AIOHTTP is an asynchronous HTTP client/server framework for asyncio and Python. Versions 3.13.2 and below contain parser logic which allows non-ASCII decimals to be present in the Range header. There is no known impact, but there is the possibility that there's a method to exploit a request smuggling vulnerability. This issue is fixed in version 3.13.3.

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

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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OSV
CVE-2025-69225: AIOHTTP is an asynchronous HTTP client/server framework for asyncio and Python↗2026-01-06
▶
OSV
AIOHTTP has unicode match groups in regexes for ASCII protocol elements↗2026-01-05
▶
CVEList
AIOHTTP Regex Mismatch Allows Unicode in ASCII-Only Protocol Fields↗2026-01-05
▶
GHSA
AIOHTTP has unicode match groups in regexes for ASCII protocol elements↗2026-01-05
▶

📋Vendor Advisories

3
Ubuntu
AIOHTTP vulnerabilities↗2026-02-13
▶
Red Hat
aiohttp: aiohttp: Request smuggling vulnerability via non-ASCII decimals in Range header↗2026-01-05
▶
Debian
CVE-2025-69225: python-aiohttp - AIOHTTP is an asynchronous HTTP client/server framework for asyncio and Python. ...↗2025
▶

🕵️Threat Intelligence

1
Wiz
CVE-2025-69225 Impact, Exploitability, and Mitigation Steps | Wiz↗
▶
CVE-2025-69225 — HTTP Request Smuggling in Aiohttp | cvebase