{"id":"CVE-2026-109966","revision":null,"records":[{"revision":"b3ddf95407c444f4b0ea27a32c44ee77","observedAt":"2026-10-26T20:35:31.018+00:00","statement":{"source":"cve-program","id":"CVE-2026-109966","aliases":[],"title":"yt-dlp-web-ui through 4.0.0 Argument Injection via Service.Formats JSON-RPC Method","description":"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.","state":0,"publishedAt":"2026-10-13T14:00:17.99+00:00","modifiedAt":"2026-10-26T19:41:49.314+00:00","affected":[{"ecosystem":"Vendor product","name":"yt-dlp-web-ui","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"vendor\": \"marcopiovanello\",\n                    \"product\": \"yt-dlp-web-ui\",\n                    \"defaultStatus\": \"unaffected\",\n                    \"packageURL\": \"pkg:golang/github.com/marcopiovanello/yt-dlp-web-ui/v4\",\n                    \"versions\": [\n                        {\n                            \"version\": \"0\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"semver\",\n                            \"lessThanOrEqual\": \"4.0.0\"\n                        }\n                    ]\n                }"}],"metrics":[{"system":"CVSS 4.0","vector":"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","score":6.9,"severity":"MEDIUM"},{"system":"CVSS 3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N","score":5.3,"severity":"MEDIUM"}],"references":["https://github.com/vazzzy071-crypto/security-advisories/blob/main/advisories/2026-10-marcopiovanello-yt-dlp-web-ui-rpc-arg-injection.md","https://github.com/marcopiovanello/yt-dlp-web-ui/blob/v4.0.0/server/formats/parser.go","https://github.com/marcopiovanello/yt-dlp-web-ui","https://www.vulncheck.com/advisories/yt-dlp-web-ui-through-4.0.0-argument-injection-via-service-formats-json-rpc-method"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-109966","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-109966","identifiers":["CVE-2026-109966"]},"retained":false,"historicalAffected":[]}],"coverage":[{"source":"cisa-kev:global","scope":"Complete CISA KEV catalog; all vendors. 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