CVE-2021-48012
High
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.
SeverityHigh
CVSS8.2
Exploit probability—
ProductGin-quin Fast-toml
PublishedOct 12, 2026
First seenOct 12, 2026
Weakness typeCWE-1321Prototype pollution
How to fix
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| Gin-Quin fast-toml | v ≤ 0.5.4 | — |
Check your version
Choose the product and enter the version you run to see whether it falls in the affected range.
In the Intelligence 360 plan
Attack Surface Management
See the assets tied to your domains, the technologies they run and known vulnerabilities in one list.