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

Date Jun 26, 2026
Type Vendor advisory
Signal High-risk advisory
Vendor / Product npm ยท js-toml
CVE CVE-2026-49293
High-risk advisory CVE-2026-49293

Summary

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

Why it matters

GitHub has published a reviewed security advisory for js-toml. Prioritize it with other application dependency updates, especially because EPSS places it in the 33% percentile.

Operator check

Check whether js-toml is present in application dependency manifests, lockfiles, or build images. Review the GitHub advisory and upgrade to a patched version where available. EPSS probability: 0.4%; percentile: 33%.

Sources

PatchBrief uses public sources. It does not scan environments, verify exposure, or replace vendor guidance.