Security advisory

{
  "id": "0fc77018aa176ee71b938b9ae1c4c057f3a73a0b3b796271c13eba7a6bca5777",
  "url": "https://osv.dev/vulnerability/CVE-2020-21896",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "CVE-2020-21896",
    "summary": "A Use After Free vulnerability in svg_dev_text_span_as_paths_defs function in source/fitz/svg-device.c in Artifex Software MuPDF 1.16.0 allows remote attackers to cause a denial of service via opening of a crafted PDF file.",
    "evidence": "osv:CVE-2020-21896",
    "products": [],
    "severity": "medium",
    "structured": {
      "id": "CVE-2020-21896",
      "aliases": [
        "CVE-2020-21896"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/artifexsoftware/mupdf",
              "type": "GIT",
              "events": [
                {
                  "introduced": "97096297d409ec6f206298444ba00719607e8ba8"
                },
                {
                  "last_affected": "97096297d409ec6f206298444ba00719607e8ba8"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "cpe": "cpe:2.3:a:artifex:mupdf:1.16.0:-:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "1.16.0-NA"
                      },
                      {
                        "last_affected": "1.16.0-NA"
                      }
                    ],
                    "source": "CPE_STRING"
                  }
                ]
              }
            }
          ],
          "versions": [
            "1.16.0-NA",
            "1.16.0-rc2",
            "1.16.0"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2020-21896.json"
          }
        }
      ],
      "modified": "2026-10-24T10:30:17.638287012Z",
      "provider": "osv",
      "references": [
        "https://lists.debian.org/debian-lts-announce/2025/08/msg00017.html",
        "https://bugs.ghostscript.com/show_bug.cgi?id=701294"
      ],
      "provider_metadata": {}
    },
    "related_cves": [
      {
        "value": "CVE-2020-21896",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 429610,
  "published_at": "2023-08-22T19:16:18.793+00:00"
}