{
  "affected": [
    {
      "ranges": [
        {
          "database_specific": {
            "versions": [
              {
                "introduced": "0"
              },
              {
                "last_affected": "1.6.1"
              }
            ]
          },
          "events": [
            {
              "introduced": "0"
            },
            {
              "last_affected": "3b25b084eab473bb6009b8e3d03ba5ff10bb4891"
            }
          ],
          "repo": "https://github.com/xlnt-community/xlnt",
          "type": "GIT"
        }
      ]
    }
  ],
  "details": "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.",
  "id": "CVE-2026-3463",
  "modified": "2026-03-14T13:50:47.654677546Z",
  "published": "2026-03-03T12:16:06.880Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/xlnt-community/xlnt/"
    },
    {
      "type": "ADVISORY",
      "url": "https://vuldb.com/?id.348530"
    },
    {
      "type": "ADVISORY",
      "url": "https://vuldb.com/?submit.764643"
    },
    {
      "type": "REPORT",
      "url": "https://github.com/xlnt-community/xlnt/issues/138"
    },
    {
      "type": "REPORT",
      "url": "https://github.com/xlnt-community/xlnt/issues/138#issuecomment-3868381672"
    },
    {
      "type": "REPORT",
      "url": "https://github.com/xlnt-community/xlnt/pull/147"
    },
    {
      "type": "REPORT",
      "url": "https://vuldb.com/?ctiid.348530"
    },
    {
      "type": "EVIDENCE",
      "url": "https://github.com/oneafter/0128/blob/main/xl2/repro"
    }
  ],
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ]
}