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    CVE-2025-69224

    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.

    Published:Jan 5, 2026
    Last Modified:Jan 14, 2026
    EPS:Jan 5, 2026
    EPSS Score:0.00055
    CVSS Score:6.5

    Affected Products

    Vendor
    Aio-libs
    Product
    Aiohttp Session
    Vendor
    Aio-libs Project
    Product
    Aiohttp
    Vendor
    Aiohttp
    Product
    Aio-libs
    Vendor
    Aiohttp
    Product
    Aiohttp

    Exploits

    No exploit reference

    Common Attack Pattern Enumeration and Classification (CAPEC)

    CAPEC-273 HTTP Response Smuggling
    CAPEC-33 HTTP Request Smuggling

    Related CVEs

    CVE-2025-69230 (CVSS 2.7) — AIOHTTP is an asynchronous HTTP client/server framework for asyncio and Python. In versions 3.13.2 and below, …
    CVE-2025-69229 (CVSS 6.6) — AIOHTTP is an asynchronous HTTP client/server framework for asyncio and Python. In versions 3.13.2 and below, …
    CVE-2025-69228 (CVSS 6.6) — AIOHTTP is an asynchronous HTTP client/server framework for asyncio and Python. Versions 3.13.2 and below allo…
    CVE-2025-69227 (CVSS 6.6) — AIOHTTP is an asynchronous HTTP client/server framework for asyncio and Python. Versions 3.13.2 and below allo…
    CVE-2025-69225 (CVSS 2.7) — AIOHTTP is an asynchronous HTTP client/server framework for asyncio and Python. Versions 3.13.2 and below cont…
    CVE-2025-69226 (CVSS 6.3) — AIOHTTP is an asynchronous HTTP client/server framework for asyncio and Python. Versions 3.13.2 and below enab…
    CVE-2025-69223 (CVSS 7.5) — AIOHTTP is an asynchronous HTTP client/server framework for asyncio and Python. Versions 3.13.2 and below allo…
    CVE-2018-1000814 (CVSS 6.5) — aio-libs aiohttp-session version 2.6.0 and earlier contains a Other/Unknown vulnerability in EncryptedCookieSt…
    CVE-2018-1000519 (CVSS 6.5) — aio-libs aiohttp-session contains a Session Fixation vulnerability in load_session function for RedisStorage (…

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High