CVE-2022-23476

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.

Database specific

{
    "cna_assigner": "GitHub_M",
    "cwe_ids": [
        "CWE-252",
        "CWE-476"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2022/23xxx/CVE-2022-23476.json"
}

References

Affected packages

Git / github.com/sparklemotion/nokogiri

Affected ranges

Type

GIT

Repo

https://github.com/sparklemotion/nokogiri

Events

Introduced

21b4ac5862dba11c89255e2f0a8082bf63eac53a

Fixed

4c80121dc309e67fa3d9f66a00516bad39b42c31

Fixed

85410e38410f670cbbc8c5b00d07b843caee88ce

Fixed

9fe0761c47c0d4270d1a5220cfd25de080350d50

Database specific

Show details

{
    "extracted_events": [
        {
            "range": [
                {
                    "introduced": "1.13.8"
                },
                {
                    "fixed": "1.13.10"
                }
            ],
            "source": "AFFECTED_FIELD",
            "strategy": "StringRangeExpression"
        },
        {
            "range": [
                {
                    "fixed": "85410e38410f670cbbc8c5b00d07b843caee88ce"
                }
            ],
            "source": "REFERENCES_COMMIT"
        },
        {
            "range": [
                {
                    "fixed": "9fe0761c47c0d4270d1a5220cfd25de080350d50"
                }
            ],
            "source": "REFERENCES_COMMIT"
        }
    ]
}

Affected versions

1.*

1.13.8

1.13.9

v1.*

v1.13.8

v1.13.9

Database specific

source

"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2022-23476.json"

vanir_signatures

[
    {
        "deprecated": false,
        "digest": {
            "line_hashes": [
                "338330347538303270265674463851703969081",
                "20281948773295152668299871912509712901",
                "51839228827875473201713963574615492252",
                "31653400320971216959746279358733104353"
            ],
            "threshold": 0.9
        },
        "id": "CVE-2022-23476-b572b4da",
        "signature_type": "Line",
        "signature_version": "v1",
        "source": "https://github.com/sparklemotion/nokogiri/commit/9fe0761c47c0d4270d1a5220cfd25de080350d50",
        "target": {
            "file": "ext/nokogiri/xml_reader.c"
        }
    },
    {
        "deprecated": false,
        "digest": {
            "function_hash": "34446822197912599254216583849376734517",
            "length": 493
        },
        "id": "CVE-2022-23476-dd36cfc2",
        "signature_type": "Function",
        "signature_version": "v1",
        "source": "https://github.com/sparklemotion/nokogiri/commit/9fe0761c47c0d4270d1a5220cfd25de080350d50",
        "target": {
            "file": "ext/nokogiri/xml_reader.c",
            "function": "rb_xml_reader_attribute_hash"
        }
    }
]

vanir_signatures_modified

"2026-10-22T07:19:14Z"