{
  "affected": [
    {
      "ranges": [
        {
          "database_specific": {
            "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"
              }
            ]
          },
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "a1b63cf1db05dc861f55e7a5a39300dbd408cac6"
            },
            {
              "fixed": "fbac242374883edf2ec14127ca6d2accf4704b6a"
            }
          ],
          "repo": "https://github.com/bakulf/libnxml",
          "type": "GIT"
        }
      ]
    }
  ],
  "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"
  },
  "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.",
  "id": "CVE-2026-123202",
  "modified": "2026-11-05T21:16:01.827103074Z",
  "published": "2026-11-05T18:16:38.397Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/123xxx/CVE-2026-123202.json"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/bakulf/libnxml"
    },
    {
      "type": "ARTICLE",
      "url": "https://github.com/bakulf/libnxml/blob/9272d1cd6fee88fe7fd4fd812736d95a6ba25f2f/src/nxml_parser.c#L952-L958"
    },
    {
      "type": "FIX",
      "url": "https://github.com/bakulf/libnxml/commit/fbac242374883edf2ec14127ca6d2accf4704b6a"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/bakulf/libnxml/releases/tag/0.18.6"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-123202"
    },
    {
      "type": "ADVISORY",
      "url": "https://www.vulncheck.com/advisories/libnxml-before-0.18.6-stack-based-buffer-overflow-via-long-multi-byte-xml-name"
    }
  ],
  "schema_version": "1.9.2",
  "severity": [
    {
      "score": "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",
      "type": "CVSS_V4"
    }
  ],
  "summary": "libnxml before 0.18.6 Stack-based Buffer Overflow via long multi-byte XML name"
}