CVE-2023-49081

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    CVE-2023-49081

    Published: 30 Nov 2023Last Modified: 28 Oct 2026

    Summary: aiohttp's ClientSession is vulnerable to CRLF injection via version

    Details: aiohttp is an asynchronous HTTP client/server framework for asyncio and Python. Improper validation made it possible for an attacker to modify the HTTP request (e.g. to insert a new header) or create a new HTTP request if the attacker controls the HTTP version. The vulnerability only occurs if the attacker can control the HTTP version of the request. This issue has been patched in version 3.9.0.

    References: https://gist.github.com/jnovikov/184afb593d9c2114d77f508e0ccd508e, https://github.com/aio-libs/aiohttp/pull/7835/files, https://lists.debian.org/debian-lts-announce/2025/02/msg00002.html, https://lists.fedoraproject.org/archives/list/[email protected]/message/WSYWMP64ZFCTC3VO6RY6EC6VSSMV6I3A/, https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/49xxx/CVE-2023-49081.json, https://github.com/aio-libs/aiohttp/security/advisories/GHSA-q3qx-c6g2-7pw2, https://nvd.nist.gov/vuln/detail/CVE-2023-49081, https://github.com/aio-libs/aiohttp/commit/1e86b777e61cf4eefc7d92fa57fa19dcc676013b

    Affected packages

    Package

    Name:

    Purl:

    Affected ranges

    Type: GIT

    Events:

    Introduced- 0
    Fixed -45b2c2c5773f0ee0d35fce8ff5716c78e91d9135

    Affected versions

    v3.9.0rc0
    v3.9.0b1
    v3.9.0b0

    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
    CVE-2023-49081 | CVE-DB