CVE-2026-50019
MediumCVSS 6.1Exploitation Probability (EPSS)
Low risk18th percentile — higher than 18% of all known CVEs
Summary
Vulnerability in yt-dlp from version 2023.09.24 to 2026.06.09 causes cookie leakage to an unintended host when using curl as an external downloader. The issue occurs during HTTP redirects or when the fragment host differs from the parent manifest host.
Risk Assessment
An attacker may intercept session or authentication cookies, potentially leading to unauthorized access to user accounts or sensitive data.
Recommendation
Immediately update yt-dlp to version 2026.06.09 or later. Until updated, avoid using curl as an external downloader.
Original NVD description (English source)
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.