big rat parsing

The tag 'big rat parsing' covers a denial-of-service vulnerability in Go's standard library, specifically in the math/big package's handling of rational numbers. The flaw, tracked as CVE-2021-33198, affects Go releases before 1.15.13 and 1.16.x before 1.16.5. Inputs with excessively large exponents passed to big.Rat.SetString or big.Rat.UnmarshalText can trigger a panic or unrecoverable fatal error, enabling attackers to crash processes. This tag is relevant for Go developers, security researchers, and system administrators managing Go-based applications who need to understand and mitigate this parsing bug.