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  • Bug#1109336: python-aiohttp: CVE-2025-53643

    From =?UTF-8?Q?Moritz_M=C3=BChlenhoff?=@21:1/5 to All on Tue Jul 15 14:40:01 2025
    Package: python-aiohttp
    X-Debbugs-CC: [email protected]
    Severity: important
    Tags: security

    Hi,

    The following vulnerability was published for python-aiohttp.

    CVE-2025-53643[0]:
    | AIOHTTP is an asynchronous HTTP client/server framework for asyncio
    | and Python. Prior to version 3.12.14, the Python parser is
    | vulnerable to a request smuggling vulnerability due to not parsing
    | trailer sections of an HTTP request. 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. Version 3.12.14 contains a patch for this issue.

    https://github.com/aio-libs/aiohttp/security/advisories/GHSA-9548-qrrj-x5pj https://github.com/aio-libs/aiohttp/commit/e8d774f635dc6d1cd3174d0e38891da5de0e2b6a (v3.12.14)


    If you fix the vulnerability please also make sure to include the
    CVE (Common Vulnerabilities & Exposures) id in your changelog entry.

    For further information see:

    [0] https://security-tracker.debian.org/tracker/CVE-2025-53643
    https://www.cve.org/CVERecord?id=CVE-2025-53643

    Please adjust the affected versions in the BTS as needed.

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