{"schema":"threatline.record/2","record":{"id":"CVE-2021-48012","aliases":[],"summary":"fast-toml through 0.5.4 Prototype Pollution via __proto__ Keys in Parsed TOML","details":"fast-toml through 0.5.4 contains a prototype pollution vulnerability that allows attackers to modify Object.prototype by supplying TOML containing __proto__, constructor or prototype key segments. Attackers can pass [__proto__] or [constructor.prototype] table headers or __proto__.x dotted keys to parse() to pollute all objects, causing denial of service or authorization bypass.","categories":["Frameworks"],"product":"fast-toml","vendor":"Gin-Quin","ecosystem":null,"affected_ranges":[{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2021-48012","source_modified_at":"2026-10-12T20:55:05.966Z","fetched_at":"2026-10-23T18:48:36.087640Z","product":"fast-toml","vendor":"Gin-Quin","versions":[{"version":"0","status":"affected","versionType":"semver","lessThanOrEqual":"0.5.4"}],"defaultStatus":"unaffected"}],"fixed_versions":[],"cvss":8.8,"severity":"High","kev":{"listed":false},"epss":{"probability":0.00414,"percentile":0.34698,"score_date":"2026-10-23"},"published_at":"2026-10-12T20:55:05.966Z","modified_at":"2026-10-12T20:55:05.966Z","provenance":[{"source":"CVE List","url":"https://www.cve.org/CVERecord?id=CVE-2021-48012","fetched_at":"2026-10-23T18:48:36.087640Z","source_modified_at":"2026-10-12T20:55:05.966Z"},{"source":"EPSS","url":"https://api.first.org/data/v1/epss?cve=CVE-2021-48012","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/Gin-Quin/fast-toml/issues/8","tags":["issue-tracking"]},{"source":"CVE List","url":"https://github.com/Gin-Quin/fast-toml/pull/3","tags":["issue-tracking","patch"]},{"source":"CVE List","url":"https://github.com/Gin-Quin/fast-toml","tags":["product"]},{"source":"CVE List","url":"https://www.vulncheck.com/advisories/fast-toml-through-0.5.4-prototype-pollution-via-proto-keys-in-parsed-toml","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":"vendor and product","confidence":"heuristic","reviewed":false},"change_timestamp":"2026-10-12T20:55:05.966Z","content_hash":"108e14f16829b788e4eaf71f0db54a143bf0bec4713d4daff7dbebd7786e2d93"}}