CVE-2023-40225

    Dashboard / Vulnerabilities / CVE-2023-40225

    CVE-2023-40225

    Published: 10 Aug 2023Last Modified: 3 Oct 2026

    Summary:

    Details: HAProxy through 2.0.32, 2.1.x and 2.2.x through 2.2.30, 2.3.x and 2.4.x through 2.4.23, 2.5.x and 2.6.x before 2.6.15, 2.7.x before 2.7.10, and 2.8.x before 2.8.2 forwards empty Content-Length headers, violating RFC 9110 section 8.6. In uncommon cases, an HTTP/1 server behind HAProxy may interpret the payload as an extra request.

    References: https://cwe.mitre.org/data/definitions/436.html, https://www.haproxy.org/download/2.6/src/CHANGELOG, https://www.haproxy.org/download/2.7/src/CHANGELOG, https://www.haproxy.org/download/2.8/src/CHANGELOG, https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/40xxx/CVE-2023-40225.json, https://nvd.nist.gov/vuln/detail/CVE-2023-40225, https://github.com/haproxy/haproxy/issues/2237, https://github.com/haproxy/haproxy/commit/6492f1f29d738457ea9f382aca54537f35f9d856

    Affected packages

    Package

    Name:

    Purl:

    Affected ranges

    Type: GIT

    Events:

    Introduced- 437fd289f2e32e56498d2d4da63852d483f284ef
    Fixed -0279df9e824723004b27cae2d4a04a7b1b924202

    Affected versions

    v2.9-dev2

    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-2023-40225 | CVE-DB