js-toml vulnerable to CPU exhaustion via O(n^2) BigInt construction on radix-prefixed integer literals

Summary js-toml versions up to and including 1.1.0 parse hexadecimal / octal / binary integer literals via a hand-written parseBigInt loop that multiplies a BigInt accumulator by the radix once per input digit. Each iteration performs a BigInt BigInt operation on an accumulator that grows linearl...

CVE-2026-49293 CPU exhaustion via O(n^2) BigInt construction on radix-prefixed integer literals

js-toml is a TOML parser for JavaScript, fully compliant with the TOML 1.0.0 Spec. Versions up to and including 1.1.0 parse hexadecimal / octal / binary integer literals via a hand-written parseBigInt loop that multiplies a BigInt accumulator by the radix once per input digit. Each iteration...

CVE-2026-49293

CVE-2026-49293 affects js-toml up to v1.1.0. The parsing of hexadecimal/octal/binary integer literals uses a hand-written parseBigInt loop that multiplies the BigInt accumulator by the radix for every digit, yielding an O(n^2) time complexity in the length of the literal. A single TOML document c...