CVE-2022-23476

    Dashboard / Vulnerabilities / CVE-2022-23476

    CVE-2022-23476

    Published: 8 Dec 2022Last Modified: 12 Aug 2026

    Summary: Unchecked return value from xmlTextReaderExpand in Nokogiri

    Details: Nokogiri is an open source XML and HTML library for the Ruby programming language. Nokogiri `1.13.8` and `1.13.9` fail to check the return value from `xmlTextReaderExpand` in the method `Nokogiri::XML::Reader#attribute_hash`. This can lead to a null pointer exception when invalid markup is being parsed. For applications using `XML::Reader` to parse untrusted inputs, this may potentially be a vector for a denial of service attack. Users are advised to upgrade to Nokogiri `>= 1.13.10`. Users may be able to search their code for calls to either `XML::Reader#attributes` or `XML::Reader#attribute_hash` to determine if they are affected.

    References: https://github.com/CVEProject/cvelistV5/tree/main/cves/2022/23xxx/CVE-2022-23476.json, https://github.com/sparklemotion/nokogiri/security/advisories/GHSA-qv4q-mr5r-qprj, https://nvd.nist.gov/vuln/detail/CVE-2022-23476, https://github.com/sparklemotion/nokogiri/commit/85410e38410f670cbbc8c5b00d07b843caee88ce, https://github.com/sparklemotion/nokogiri/commit/9fe0761c47c0d4270d1a5220cfd25de080350d50

    Affected packages

    Package

    Name:

    Purl:

    Affected ranges

    Type: GIT

    Events:

    Introduced- 21b4ac5862dba11c89255e2f0a8082bf63eac53a
    Fixed -4c80121dc309e67fa3d9f66a00516bad39b42c31

    Affected versions

    1.13.8
    1.13.9

    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-2022-23476 | CVE-DB