CVE-2026-123202

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Source

https://cve.org/CVERecord?id=CVE-2026-123202

Import Source

https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-123202.json

JSON Data

https://api.osv.dev/v1/vulns/CVE-2026-123202

Published

2026-11-05T18:16:38Z

Modified

2026-11-05T21:32:23Z

Severity

8.7 (High) CVSS_V4 - CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N CVSS Calculator

Summary

libnxml before 0.18.6 Stack-based Buffer Overflow via long multi-byte XML name

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.

Database specific

{
    "cna_assigner": "VulnCheck",
    "cwe_ids": [
        "CWE-121"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/123xxx/CVE-2026-123202.json"
}

References

Affected packages

Git / github.com/bakulf/libnxml

Affected ranges

Type

GIT

Repo

https://github.com/bakulf/libnxml

Events

Introduced

Fixed

a1b63cf1db05dc861f55e7a5a39300dbd408cac6

Fixed

fbac242374883edf2ec14127ca6d2accf4704b6a

Database specific

Show details

{
    "extracted_events": [
        {
            "range": [
                {
                    "introduced": "0"
                },
                {
                    "fixed": "0.18.6"
                }
            ],
            "source": "AFFECTED_FIELD",
            "strategy": "StandardRange"
        },
        {
            "range": [
                {
                    "fixed": "fbac242374883edf2ec14127ca6d2accf4704b6a"
                }
            ],
            "source": "REFERENCES_COMMIT"
        },
        {
            "original_tag": "0.18.6",
            "range": [
                {
                    "fixed": "a1b63cf1db05dc861f55e7a5a39300dbd408cac6"
                }
            ],
            "source": "REFERENCES_TAG"
        }
    ]
}

Affected versions

0.*

0.18.3

0.18.5

Database specific

source

"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-123202.json"