xlnt-community xlnt Compound Document binary.hpp append heap-based overflow

{
  "id": "db6e7587bd6be55be746dc14992723c839b8ad905c3f28714235855f5d88237b",
  "url": "https://osv.dev/vulnerability/CVE-2026-3463",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "xlnt-community xlnt Compound Document binary.hpp append heap-based overflow",
    "summary": "A weakness has been identified in xlnt-community xlnt up to 1.6.1. Impacted is the function xlnt::detail::binary_writer::append of the file source/detail/binary.hpp of the component Compound Document Parser. This manipulation causes heap-based buffer overflow. The attack can only be executed locally. The exploit has been made available to the public and could be used for attacks. Patch name: 147. It is suggested to install a patch to address this issue.",
    "evidence": "osv:CVE-2026-3463",
    "products": [],
    "severity": "low",
    "structured": {
      "id": "CVE-2026-3463",
      "aliases": [
        "CVE-2026-3463"
      ],
      "metrics": [
        {
          "type": "CVSS_V4",
          "score": "CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:P"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/xlnt-community/xlnt",
              "type": "GIT",
              "events": [
                {
                  "introduced": "8b28e662cbd9e6c2ff3e020a8a163564cbc48e42"
                },
                {
                  "last_affected": "3b25b084eab473bb6009b8e3d03ba5ff10bb4891"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "range": [
                      {
                        "introduced": "1.6.0"
                      },
                      {
                        "last_affected": "1.6.0"
                      }
                    ],
                    "source": "AFFECTED_FIELD",
                    "strategy": "StandaloneSingleVersion"
                  },
                  {
                    "range": [
                      {
                        "introduced": "1.6.1"
                      },
                      {
                        "last_affected": "1.6.1"
                      }
                    ],
                    "source": "AFFECTED_FIELD",
                    "strategy": "StandaloneSingleVersion"
                  },
                  {
                    "cpe": "cpe:2.3:a:xlnt-community:xlnt:*:*:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "0"
                      },
                      {
                        "last_affected": "1.6.1"
                      }
                    ],
                    "source": "CPE_RANGE"
                  }
                ]
              }
            }
          ],
          "versions": [
            "1.6.0",
            "1.6.1",
            "v1.6.1",
            "v1.6.0"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-3463.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:24.756154512Z",
      "provider": "osv",
      "references": [
        "https://github.com/xlnt-community/xlnt/",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/3xxx/CVE-2026-3463.json",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-3463",
        "https://vuldb.com/?id.348530",
        "https://vuldb.com/?submit.764643",
        "https://github.com/xlnt-community/xlnt/issues/138",
        "https://github.com/xlnt-community/xlnt/issues/138#issuecomment-3868381672",
        "https://vuldb.com/?ctiid.348530",
        "https://github.com/xlnt-community/xlnt/pull/147",
        "https://github.com/oneafter/0128/blob/main/xl2/repro"
      ],
      "provider_metadata": {
        "cwe_ids": [
          "CWE-119",
          "CWE-122"
        ],
        "cna_assigner": "VulDB",
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/3xxx/CVE-2026-3463.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2026-3463",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 491481,
  "published_at": "2026-03-03T12:02:10.57+00:00"
}