{"id":"CVE-2026-109966","title":"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","summary":"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 c…","severity":"medium","cvss":5.3,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N","cwe":["CWE-88"],"published":"2026-10-13","updated":"2026-10-13","sourceUpdated":"2026-10-13T14:17:36.217","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-109966","references":[{"url":"https://github.com/marcopiovanello/yt-dlp-web-ui","label":"disclosure@vulncheck.com"},{"url":"https://github.com/marcopiovanello/yt-dlp-web-ui/blob/v4.0.0/server/formats/parser.go","label":"disclosure@vulncheck.com"},{"url":"https://github.com/vazzzy071-crypto/security-advisories/blob/main/advisories/2026-10-marcopiovanello-yt-dlp-web-ui-rpc-arg-injection.md","label":"disclosure@vulncheck.com"},{"url":"https://www.vulncheck.com/advisories/yt-dlp-web-ui-through-4.0.0-argument-injection-via-service-formats-json-rpc-method","label":"disclosure@vulncheck.com"}],"tags":["nvd","cve.org","exploit-available"],"ingestedAt":"2026-10-13T14:29:01.858Z","vendor":"marcopiovanello","product":"yt-dlp-web-ui","affected":["yt-dlp-web-ui <= 4.0.0"],"epss":0.00411,"epssPercentile":0.35216,"exploitAvailable":true,"ssvc":{"exploitation":"poc","automatable":"yes","technicalImpact":"partial","timestamp":"2026-10-26T19:41:41.762621Z"},"slug":"CVE-2026-109966","body":"## Overview\n\nyt-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.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"twilight","depthScore":41,"depthScoreParts":{"impact":29.2,"likelihood":0.1,"exploitation":12,"ransomware":0},"changes":[{"seq":229766,"id":"CVE-2026-109966","ts":1793047361669,"field":"exploit_available","old":"false","new":"true"}]}