Security advisory

{
  "id": "caa36c5e85c89989fafd430eeaf7ab9d52a68c73f66760f9e0a53564d6145001",
  "url": "https://osv.dev/vulnerability/CVE-2019-16784",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "CVE-2019-16784",
    "summary": "In PyInstaller before version 3.6, only on Windows, a local privilege escalation vulnerability is present in this particular case: If a software using PyInstaller in \"onefile\" mode is launched by a privileged user (at least more than the current one) which have his \"TempPath\" resolving to a world writable directory. This is the case for example if the software is launched as a service or as a scheduled task using a system account (TempPath will be C:\\Windows\\Temp). In order to be exploitable the software has to be (re)started after the attacker launch the exploit program, so for a service launched at startup, a service restart is needed (e.g. after a crash or an upgrade).",
    "evidence": "osv:CVE-2019-16784",
    "products": [],
    "severity": "high",
    "structured": {
      "id": "CVE-2019-16784",
      "aliases": [
        "CVE-2019-16784",
        "GHSA-7fcj-pq9j-wh2r",
        "PYSEC-2020-175"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/pyinstaller/pyinstaller",
              "type": "GIT",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "fixed": "6d4cce1f8eb80c0bf49d35876d28daa55a05800f"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "cpe": "cpe:2.3:a:pyinstaller:pyinstaller:*:*:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "0"
                      },
                      {
                        "fixed": "3.6"
                      }
                    ],
                    "source": "CPE_RANGE"
                  }
                ]
              }
            }
          ],
          "versions": [
            "v3.5",
            "v3.4",
            "v3.3.1",
            "v3.3",
            "v3.2.1",
            "v3.2",
            "v3.1.1",
            "v3.1",
            "3.0",
            "3.0.dev8",
            "3.0.dev7",
            "3.0.dev2"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2019-16784.json"
          }
        }
      ],
      "modified": "2026-10-20T10:52:39.419610727Z",
      "provider": "osv",
      "references": [
        "https://github.com/pyinstaller/pyinstaller/security/advisories/GHSA-7fcj-pq9j-wh2r"
      ],
      "provider_metadata": {}
    },
    "related_cves": [
      {
        "value": "CVE-2019-16784",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 383716,
  "published_at": "2020-01-14T20:15:11.957+00:00"
}