{"id":"CVE-2026-109966","summary":"yt-dlp-web-ui through 4.0.0 Argument Injection via Service.Formats JSON-RPC Method","details":"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.","modified":"2026-10-15T02:47:27.698794770Z","published":"2026-10-13T14:00:17.990Z","database_specific":{"cna_assigner":"VulnCheck","cwe_ids":["CWE-88"],"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/109xxx/CVE-2026-109966.json"},"references":[{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/109xxx/CVE-2026-109966.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-109966"},{"type":"ADVISORY","url":"https://www.vulncheck.com/advisories/yt-dlp-web-ui-through-4.0.0-argument-injection-via-service-formats-json-rpc-method"},{"type":"PACKAGE","url":"https://github.com/marcopiovanello/yt-dlp-web-ui"},{"type":"ARTICLE","url":"https://github.com/marcopiovanello/yt-dlp-web-ui/blob/v4.0.0/server/formats/parser.go"},{"type":"EVIDENCE","url":"https://github.com/vazzzy071-crypto/security-advisories/blob/main/advisories/2026-10-marcopiovanello-yt-dlp-web-ui-rpc-arg-injection.md"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/marcopiovanello/yt-dlp-web-ui","events":[{"introduced":"0"},{"fixed":"143cc28a97fb8e21c84c9436778fff480e2fa36b"}],"database_specific":{"extracted_events":[{"introduced":"0"},{"last_affected":"4.0.0"},{"fixed":"4.0.0"}],"source":["AFFECTED_FIELD","DESCRIPTION"]}}],"versions":["v3.2.6","v3.2.5","v3.2.4","v3.2.3","v3.2.2","v3.2.1","v3.2.0-fix","v3.2.0","v3.1.2","v3.1.1","v.3.1.0","v3.0.9","v3.0.8","v3.0.7","v3.0.6","v3.0.5","v.3.0.4","v3.0.3","v3.0.2","v3.0.1","v3.0.0","v2.10.0","v.2.0.9","v2.0.8","v2.0.7","v2.0.6","v2.0.5","v2.0.4","v2.0.3","v2.0.2","v2.0.1","v2.0.0"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-109966.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V4","score":"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"}]}