UBUNTU-CVE-2026-5720

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    UBUNTU-CVE-2026-5720

    Published: 17 Apr 2026Last Modified: 7 Sept 2026
    Upstream:
    CVE-2026-5720
    Aliases:
    USN-8731-1

    Summary:

    Details: miniupnpd contains an integer underflow vulnerability in SOAPAction header parsing that allows remote attackers to cause a denial of service or information disclosure by sending a malformed SOAPAction header with a single quote. Attackers can trigger an out-of-bounds memory read by exploiting improper length validation in ParseHttpHeaders(), where the parsed length underflows to a large unsigned value when passed to memchr(), causing the process to scan memory far beyond the allocated HTTP request buffer.

    References: https://ubuntu.com/security/CVE-2026-5720, https://www.cve.org/CVERecord?id=CVE-2026-5720, https://ubuntu.com/security/notices/USN-8731-1

    Affected packages

    Package

    Name: miniupnpd

    Purl: pkg:deb/ubuntu/miniupnpd?arch=source&distro=esm-apps-legacy%2Fxenial

    Affected ranges

    Type: ECOSYSTEM

    Events:

    Introduced- 0
    Fixed -1.8.20140523-4.1+deb9u2ubuntu0.1~esm1

    Affected versions

    1.8.20140523-4
    1.8.20140523-4.1+deb9u1build0.16.04.1
    1.8.20140523-4.1+deb9u2build0.16.04.1

    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
    UBUNTU-CVE-2026-5720 | CVE-DB