{
  "affected": [
    {
      "ecosystem_specific": {},
      "package": {
        "ecosystem": "Alpine:v3.19",
        "name": "yt-dlp",
        "purl": "pkg:apk/alpine/yt-dlp?arch=source"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "2021.04.11"
            },
            {
              "fixed": "2023.09.24-r0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "ecosystem_specific": {},
      "package": {
        "ecosystem": "Alpine:v3.20",
        "name": "yt-dlp",
        "purl": "pkg:apk/alpine/yt-dlp?arch=source"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "2021.04.11"
            },
            {
              "fixed": "0-r0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "ecosystem_specific": {},
      "package": {
        "ecosystem": "Alpine:v3.21",
        "name": "yt-dlp",
        "purl": "pkg:apk/alpine/yt-dlp?arch=source"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "2021.04.11"
            },
            {
              "fixed": "0-r0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "ecosystem_specific": {},
      "package": {
        "ecosystem": "Alpine:v3.22",
        "name": "yt-dlp",
        "purl": "pkg:apk/alpine/yt-dlp?arch=source"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "2021.04.11"
            },
            {
              "fixed": "0-r0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "ecosystem_specific": {},
      "package": {
        "ecosystem": "Alpine:v3.23",
        "name": "yt-dlp",
        "purl": "pkg:apk/alpine/yt-dlp?arch=source"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "2021.04.11"
            },
            {
              "fixed": "0-r0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "ecosystem_specific": {},
      "package": {
        "ecosystem": "Alpine:v3.24",
        "name": "yt-dlp",
        "purl": "pkg:apk/alpine/yt-dlp?arch=source"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "2021.04.11"
            },
            {
              "fixed": "0-r0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "details": "yt-dlp is a youtube-dl fork with additional features and fixes. yt-dlp allows the user to provide shell command lines to be executed at various stages in its download steps through the `--exec` flag. This flag allows output template expansion in its argument, so that metadata values may be used in the shell commands. The metadata fields can be combined with the `%q` conversion, which is intended to quote/escape these values so they can be safely passed to the shell. However, the escaping used for `cmd` (the shell used by Python's `subprocess` on Windows) does not properly escape special characters, which can allow for remote code execution if `--exec` is used directly with maliciously crafted remote data. This vulnerability only impacts `yt-dlp` on Windows, and the vulnerability is present regardless of whether `yt-dlp` is run from `cmd` or from `PowerShell`. Support for output template expansion in `--exec`, along with this vulnerable behavior, was added to `yt-dlp` in version 2021.04.11. yt-dlp version 2023.09.24 fixes this issue by properly escaping each special character. `\\n` will be replaced by `\\r` as no way of escaping it has been found. It is recommended to upgrade yt-dlp to version 2023.09.24 as soon as possible. Also, always be careful when using --exec, because while this specific vulnerability has been patched, using unvalidated input in shell commands is inherently dangerous. For Windows users who are not able to upgrade: 1. Avoid using any output template expansion in --exec other than {} (filepath). 2. If expansion in --exec is needed, verify the fields you are using do not contain \", | or \u0026. 3. Instead of using --exec, write the info json and load the fields from it instead.\n",
  "id": "ALPINE-CVE-2023-40581",
  "modified": "2026-11-03T06:17:59.333992216Z",
  "published": "2023-09-25T19:15:09.960Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://security.alpinelinux.org/vuln/CVE-2023-40581"
    }
  ],
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ],
  "upstream": [
    "CVE-2023-40581"
  ]
}