Vulnerability-Lookup

GHSA-F7J3-774F-RFHJ

Vulnerability from github – Published: 2026-06-16 20:16 – Updated: 2026-06-16 20:16

Summary

yt-dlp: File Downloader cookie leak with curl

Details

Summary

If curl is used an external downloader for yt-dlp, cookies may be leaked to an unintended host upon HTTP redirect or when the host for download fragments differs from their parent manifest's.

This is the equivalent to GHSA-v8mc-9377-rwjj for the curl downloader. The vulnerable behavior is present in yt-dlp released since 2023.09.24.

Details

At the file download stage, the cookies are passed by yt-dlp to the file downloader via --cookie. However, unless these are loaded from a file, this operation does not activate the cookie engine. As a result, curl will send cookies with requests to domains or paths for which the cookies are not scoped.

An example of a potential attack scenario exploiting this vulnerability: 1. an attacker has crafted a malicious website with an embedded URL designed to be detected by yt-dlp as a video download. This embedded URL has the domain of a trusted site that the user has loaded cookies for, and conducts an unvalidated redirect to a target URL. 2. yt-dlp extracts this URL and calculates the cookies which are then passed to curl. 3. the download URL redirects to a server controlled by the attacker, to which curl forwards the user's sensitive cookie information.

Patches

yt-dlp version 2026.06.09 fixes this issue by doing the following:

Pass the cookies through stdin via --cookie - if curl is version 7.59 or higher.
Pass the cookies via --cookie /dev/fd/0 if the system supports this device file.
In all other cases create a temporary file, save the cookies and then pass via --cookie <file>.

Workarounds

It is recommended to upgrade yt-dlp to version 2026.06.09 as soon as possible.

For users who are not able to upgrade:

Do not use --downloader curl.

Severity

6.1 (Medium)


                  
                    CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:H/I:N/A:N

Show details on source website

JSON

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{
  "affected": [
    {
      "package": {
        "ecosystem": "PyPI",
        "name": "yt-dlp"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "2023.9.24"
            },
            {
              "fixed": "2026.6.9"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2026-50019"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-200"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2026-06-16T20:16:56Z",
    "nvd_published_at": null,
    "severity": "MODERATE"
  },
  "details": "### Summary\nIf curl is used an external downloader for yt-dlp, cookies may be leaked to an unintended host upon HTTP redirect or when the host for download fragments differs from their parent manifest\u0027s.\n\nThis is the equivalent to [GHSA-v8mc-9377-rwjj](\u003chttps://github.com/yt-dlp/yt-dlp/security/advisories/GHSA-v8mc-9377-rwjj\u003e) for the `curl` downloader. The vulnerable behavior is present in [yt-dlp](https://github.com/yt-dlp/yt-dlp) released since 2023.09.24.\n\n### Details\nAt the file download stage, the cookies are passed by yt-dlp to the file downloader via `--cookie`. However, unless these are loaded from a file, this operation does not activate the cookie engine. As a result, `curl` will send cookies with requests to domains or paths for which the cookies are not scoped.\n\nAn example of a potential attack scenario exploiting this vulnerability:\n1. an attacker has crafted a malicious website with an embedded URL designed to be detected by yt-dlp as a video download. This embedded URL has the domain of a trusted site that the user has loaded cookies for, and conducts an [unvalidated redirect](https://cheatsheetseries.owasp.org/cheatsheets/Unvalidated_Redirects_and_Forwards_Cheat_Sheet.html) to a target URL.\n2. yt-dlp extracts this URL and calculates the cookies which are then passed to `curl`.\n3. the download URL redirects to a server controlled by the attacker, to which `curl` forwards the user\u0027s sensitive cookie information.\n\n### Patches\nyt-dlp version 2026.06.09 fixes this issue by doing the following:\n\n- Pass the cookies through stdin via `--cookie -` if `curl` is version 7.59 or higher.\n- Pass the cookies via `--cookie /dev/fd/0` if the system supports this device file.\n- In all other cases create a temporary file, save the cookies and then pass via `--cookie \u003cfile\u003e`.\n\n### Workarounds\nIt is recommended to upgrade yt-dlp to version 2026.06.09 as soon as possible.\n\nFor users who are not able to upgrade:\n\n- Do not use `--downloader curl`.",
  "id": "GHSA-f7j3-774f-rfhj",
  "modified": "2026-06-16T20:16:56Z",
  "published": "2026-06-16T20:16:56Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/yt-dlp/yt-dlp/security/advisories/GHSA-f7j3-774f-rfhj"
    },
    {
      "type": "WEB",
      "url": "https://github.com/yt-dlp/yt-dlp/commit/2726572520238356bcf64aba2040228648b44c82"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/yt-dlp/yt-dlp"
    },
    {
      "type": "WEB",
      "url": "https://github.com/yt-dlp/yt-dlp-nightly-builds/releases/tag/2026.06.09.230517"
    },
    {
      "type": "WEB",
      "url": "https://github.com/yt-dlp/yt-dlp/releases/tag/2026.06.09"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:H/I:N/A:N",
      "type": "CVSS_V3"
    }
  ],
  "summary": "yt-dlp: File Downloader cookie leak with curl "
}

CVE-2026-50019 (GCVE-0-2026-50019)

Vulnerability from cvelistv5 – Published: 2026-06-23 16:13 – Updated: 2026-06-23 17:57

Title

yt-dlp: File Downloader cookie leak with curl

Summary

yt-dlp is a command-line audio/video downloader. From 2023.09.24 until 2026.06.09, if curl is used as an external downloader for yt-dlp, cookies may be leaked to an unintended host upon HTTP redirect or when the host for download fragments differs from their parent manifest's. At the file download stage, the cookies are passed by yt-dlp to the file downloader via --cookie. However, unless these are loaded from a file, this operation does not activate the cookie engine. As a result, curl will send cookies with requests to domains or paths for which the cookies are not scoped. This vulnerability is fixed in 2026.06.09.

Severity

6.1 (Medium)


                        
                          CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:H/I:N/A:N

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator (v2.0.3)

CWE

CWE-200 - Exposure of Sensitive Information to an Unauthorized Actor

Assigner

GitHub_M

References

1 reference

URL	Tags
https://github.com/yt-dlp/yt-dlp/security/advisor…	x_refsource_CONFIRM

Impacted products

1 product

Vendor	Product	Version
yt-dlp	yt-dlp	Affected: >= 2023.09.24, < 2026.06.09

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-50019",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-06-23T17:57:06.488536Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-06-23T17:57:20.992Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "product": "yt-dlp",
          "vendor": "yt-dlp",
          "versions": [
            {
              "status": "affected",
              "version": "\u003e= 2023.09.24, \u003c 2026.06.09"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "yt-dlp is a command-line audio/video downloader. From 2023.09.24 until 2026.06.09, if curl is used as an external downloader for yt-dlp, cookies may be leaked to an unintended host upon HTTP redirect or when the host for download fragments differs from their parent manifest\u0027s. At the file download stage, the cookies are passed by yt-dlp to the file downloader via --cookie. However, unless these are loaded from a file, this operation does not activate the cookie engine. As a result, curl will send cookies with requests to domains or paths for which the cookies are not scoped. This vulnerability is fixed in 2026.06.09."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "attackComplexity": "HIGH",
            "attackVector": "NETWORK",
            "availabilityImpact": "NONE",
            "baseScore": 6.1,
            "baseSeverity": "MEDIUM",
            "confidentialityImpact": "HIGH",
            "integrityImpact": "NONE",
            "privilegesRequired": "NONE",
            "scope": "CHANGED",
            "userInteraction": "REQUIRED",
            "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:H/I:N/A:N",
            "version": "3.1"
          }
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-200",
              "description": "CWE-200: Exposure of Sensitive Information to an Unauthorized Actor",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-06-23T16:13:26.676Z",
        "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
        "shortName": "GitHub_M"
      },
      "references": [
        {
          "name": "https://github.com/yt-dlp/yt-dlp/security/advisories/GHSA-f7j3-774f-rfhj",
          "tags": [
            "x_refsource_CONFIRM"
          ],
          "url": "https://github.com/yt-dlp/yt-dlp/security/advisories/GHSA-f7j3-774f-rfhj"
        }
      ],
      "source": {
        "advisory": "GHSA-f7j3-774f-rfhj",
        "discovery": "UNKNOWN"
      },
      "title": "yt-dlp: File Downloader cookie leak with curl"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
    "assignerShortName": "GitHub_M",
    "cveId": "CVE-2026-50019",
    "datePublished": "2026-06-23T16:13:26.676Z",
    "dateReserved": "2026-06-02T22:46:02.579Z",
    "dateUpdated": "2026-06-23T17:57:20.992Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Detection rules are retrieved from Rulezet.

Action not permitted

GHSA-F7J3-774F-RFHJ

Summary

Details

Patches

Workarounds

CVE-2026-50019 (GCVE-0-2026-50019)

Tags

Sightings

Nomenclature