Security advisory

{
  "id": "b899ae5657cabfec7bd7fe6194032b678a0f4ffe8277b62a48e951b869c96600",
  "url": "https://osv.dev/vulnerability/CVE-2021-28300",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "CVE-2021-28300",
    "summary": "NULL Pointer Dereference in the \"isomedia/track.c\" module's \"MergeTrack()\" function of GPAC v0.5.2 allows attackers to execute arbitrary code or cause a Denial-of-Service (DoS) by uploading a malicious MP4 file.",
    "evidence": "osv:CVE-2021-28300",
    "products": [],
    "severity": "critical",
    "structured": {
      "id": "CVE-2021-28300",
      "aliases": [
        "CVE-2021-28300"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/gpac/gpac",
              "type": "GIT",
              "events": [
                {
                  "introduced": "cb0a053f47173556f193c2d996262d8c6aaac9bb"
                },
                {
                  "last_affected": "cb0a053f47173556f193c2d996262d8c6aaac9bb"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "cpe": "cpe:2.3:a:gpac:gpac:0.5.2:*:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "0.5.2"
                      },
                      {
                        "last_affected": "0.5.2"
                      }
                    ],
                    "source": "CPE_STRING"
                  }
                ]
              }
            }
          ],
          "versions": [
            "0.5.2",
            "v0.5.2"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2021-28300.json"
          }
        }
      ],
      "modified": "2026-10-20T10:49:38.016672219Z",
      "provider": "osv",
      "references": [
        "https://github.com/gpac/gpac/issues/1702"
      ],
      "provider_metadata": {}
    },
    "related_cves": [
      {
        "value": "CVE-2021-28300",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 380619,
  "published_at": "2021-04-14T14:15:14.053+00:00"
}