{"schema":"threatline.record/2","record":{"id":"CVE-2026-109966","aliases":[],"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.","categories":["Unclassified"],"product":"yt-dlp-web-ui","vendor":"marcopiovanello","ecosystem":null,"affected_ranges":[{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-109966","source_modified_at":"2026-10-13T14:00:17.990Z","fetched_at":"2026-10-23T18:48:36.087640Z","product":"yt-dlp-web-ui","vendor":"marcopiovanello","versions":[{"version":"0","status":"affected","versionType":"semver","lessThanOrEqual":"4.0.0"}],"defaultStatus":"unaffected"}],"fixed_versions":[],"cvss":6.9,"severity":"Medium","kev":{"listed":false},"epss":{"probability":0.00411,"percentile":0.3432,"score_date":"2026-10-23"},"published_at":"2026-10-13T14:00:17.990Z","modified_at":"2026-10-13T14:00:17.990Z","provenance":[{"source":"CVE List","url":"https://www.cve.org/CVERecord?id=CVE-2026-109966","fetched_at":"2026-10-23T18:48:36.087640Z","source_modified_at":"2026-10-13T14:00:17.990Z"},{"source":"EPSS","url":"https://api.first.org/data/v1/epss?cve=CVE-2026-109966","fetched_at":"2026-10-23T18:42:43.628194Z","source_modified_at":"2026-10-23"}],"sources":["CVE List","EPSS"],"references":[{"source":"CVE List","url":"https://github.com/vazzzy071-crypto/security-advisories/blob/main/advisories/2026-10-marcopiovanello-yt-dlp-web-ui-rpc-arg-injection.md","tags":["third-party-advisory","exploit"]},{"source":"CVE List","url":"https://github.com/marcopiovanello/yt-dlp-web-ui/blob/v4.0.0/server/formats/parser.go","tags":["technical-description"]},{"source":"CVE List","url":"https://github.com/marcopiovanello/yt-dlp-web-ui","tags":["product"]},{"source":"CVE List","url":"https://www.vulncheck.com/advisories/yt-dlp-web-ui-through-4.0.0-argument-injection-via-service-formats-json-rpc-method","tags":["third-party-advisory"]}],"locations":[],"motoko_assessment":{"status":"requires_architecture_review","automatic_remediation":false},"cve_state":"PUBLISHED","cvss_source":"CVE List","classification":{"method":"product-first software-layer rules","rules_version":"2.1","matched_on":null,"confidence":"unknown","reviewed":false},"change_timestamp":"2026-10-13T14:00:17.990Z","content_hash":"ffce4deb47db3cc4fccfef89aa0ace16cfb76c3fda10a4914ae75d5d49800c5c"}}