UBUNTU-CVE-2026-123202

    Dashboard / Vulnerabilities / UBUNTU-CVE-2026-123202

    UBUNTU-CVE-2026-123202

    Published: 6 Nov 2026Last Modified: 7 Nov 2026
    Upstream:
    CVE-2026-123202

    Summary:

    Details: libnxml before 0.18.6 contains a stack-based buffer overflow vulnerability in src/nxml_parser.c that allows remote attackers to write past a 1024-byte stack buffer via long XML names. Attackers can supply XML or RSS feeds with a 1022-character element, attribute, DOCTYPE or entity name ending in a multi-byte UTF-8 character to crash parsing applications.

    References: https://ubuntu.com/security/CVE-2026-123202, https://www.cve.org/CVERecord?id=CVE-2026-123202, https://github.com/bakulf/libnxml/blob/9272d1cd6fee88fe7fd4fd812736d95a6ba25f2f/src/nxml_parser.c#L952-L958, https://github.com/bakulf/libnxml/commit/fbac242374883edf2ec14127ca6d2accf4704b6a, https://github.com/bakulf/libnxml/releases/tag/0.18.6, https://www.vulncheck.com/advisories/libnxml-before-0.18.6-stack-based-buffer-overflow-via-long-multi-byte-xml-name

    Affected packages

    Package

    Name: libnxml

    Purl: pkg:deb/ubuntu/libnxml?arch=source&distro=xenial

    Affected ranges

    Type: ECOSYSTEM

    Events:

    Introduced- 0
    Fixed -None

    Affected versions

    0.18.3-6

    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-2026-123202 | CVE-DB