{
  "cveId": "CVE-2023-35934",
  "url": "https://patchblox.com/security/cve/CVE-2023-35934",
  "summary": "CVE-2023-35934 is fixed in yt-dlp on 1 platform, first by DEBIAN-CVE-2023-35934, released July 6, 2023. It is not reported as exploited. Patch Radar priority: High.",
  "title": "yt-dlp: yt-dlp is a command-line program to download videos from video sites",
  "description": "yt-dlp is a command-line program to download videos from video sites. During file downloads, yt-dlp or the external downloaders that yt-dlp employs may leak cookies on HTTP redirects to a different host, or leak them when the host for download fragments differs from their parent manifest\u0027s host. This vulnerable behavior is present in yt-dlp prior to 2023.07.06 and nightly 2023.07.06.185519. All native and external downloaders are affected, except for \u0060curl\u0060 and \u0060httpie\u0060 (version 3.1.0 or later).  At the file download stage, all cookies are passed by yt-dlp to the file downloader as a \u0060Cookie\u0060 header, thereby losing their scope. This also occurs in yt-dlp\u0027s info JSON output, which may be used by external tools. As a result, the downloader or external tool may indiscriminately send cookies with requests to domains or paths for which the cookies are not scoped.  yt-dlp version 2023.07.06 and nightly 2023.07.06.185519 fix this issue by removing the \u0060Cookie\u0060 header upon HTTP redirects; having native downloaders calculate the \u0060Cookie\u0060 header from the cookiejar, utilizing external downloaders\u0027 built-in support for cookies instead of passing them as header arguments, disabling HTTP redirectiong if the external downloader does not have proper cookie support, processing cookies passed as HTTP headers to limit their scope, and having a separate field for cookies in the info dict storing more information about scoping  Some workarounds are available for those who are unable to upgrade. Avoid using cookies and user authentication methods. While extractors may set custom cookies, these usually do not contain sensitive information. Alternatively, avoid using \u0060--load-info-json\u0060. Or, if authentication is a must: verify the integrity of download links from unknown sources in browser (including redirects) before passing them to yt-dlp; use \u0060curl\u0060 as external downloader, since it is not impacted; and/or avoid fragmented formats such as HLS/m3u8, DASH/mpd and ISM.",
  "published": "2023-07-06T20:15:09Z",
  "severity": "high",
  "cvss": 8.2,
  "cvssVector": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:L/A:N",
  "epss": 0.01047,
  "epssPercentile": 0.64399,
  "priority": "High",
  "priorityTier": 3,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "fixes": [
    {
      "platform": "linux",
      "product": "yt-dlp",
      "release": "Debian 13.5 (trixie)",
      "fixedVersion": "2023.07.06-1",
      "fix": "DEBIAN-CVE-2023-35934",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2023-35934",
      "released": "2023-07-06T20:15:09Z"
    },
    {
      "platform": "linux",
      "product": "yt-dlp",
      "release": "Debian 14",
      "fixedVersion": "2023.07.06-1",
      "fix": "DEBIAN-CVE-2023-35934",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2023-35934",
      "released": "2023-07-06T20:15:09Z"
    }
  ],
  "noFixYet": [],
  "dataAsOf": "2026-11-08T06:59:42Z",
  "attribution": {
    "text": "Data: Patchblox Patch Radar",
    "url": "https://patchblox.com/security/patch-radar",
    "terms": "https://patchblox.com/security/patch-radar/use-the-data"
  }
}