{"id":"CVE-2021-48012","published":"2026-10-12T21:17:06.057","lastModified":"2026-10-16T19:18:44.867","description":"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.","cvssScore":8.2,"cvssSeverity":"HIGH","cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:L","cwes":["CWE-1321"],"vendors":[],"products":[],"references":[{"url":"https://github.com/Gin-Quin/fast-toml","tags":[]},{"url":"https://github.com/Gin-Quin/fast-toml/issues/8","tags":[]},{"url":"https://github.com/Gin-Quin/fast-toml/pull/3","tags":[]},{"url":"https://www.vulncheck.com/advisories/fast-toml-through-0.5.4-prototype-pollution-via-proto-keys-in-parsed-toml","tags":[]}],"exploitRefs":[{"url":"https://github.com/Gin-Quin/fast-toml","tags":[]},{"url":"https://github.com/Gin-Quin/fast-toml/issues/8","tags":[]},{"url":"https://github.com/Gin-Quin/fast-toml/pull/3","tags":[]}],"hasPoc":true,"ai":null}