CVE-2026-109966mediumCWE-88

CVE-2026-109966: medium-severity vulnerability in marcopiovanello yt-dlp-web-ui

yt-dlp-web-ui through 4.0.0 Argument Injection via Service.Formats JSON-RPC Method

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33Vexday Risk Score

No sign of exploitation. It has a public proof of concept.

ssvc Attendcvss 6.9epss 0.4%
yt-dlp-web-ui through 4.0.0 contains an argument injection vulnerability that allows unauthenticated remote attackers to inject yt-dlp options by supplying a dash-prefixed url parameter to the Service.Formats JSON-RPC method. Attackers can send values like --load-info-json via /rpc/http or /rpc/ws to make yt-dlp load attacker-chosen JSON files from the server filesystem, with contents reflected in responses.
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N
Affected products
marcopiovanello · yt-dlp-web-ui
⚠ Public resources, to assess the exposure of systems you control or are authorized to test. Test only with authorization.
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