GHSA-4qx8-w7c3-pj3p: toml (CVE-2026-114141)

Package	Ecosystem	Affected	Fixed in
toml	npm	<5.0.1	5.0.1

Machine-written summary

Summary written by Claude Haiku from the source advisory. Not reviewed by a person.

The toml npm package (toml-node) before 5.0.1 has a quadratic-complexity denial-of-service issue in toml.parse(): the addTableArray() function rescans bookkeeping sets on every array-of-tables ([[name]]) header, so many such headers make parsing very slow. An attacker only needs to get a TOML string parsed by an application using the library, with no authentication required, and the source reports that a roughly 321 KB document took about 10 seconds to parse, blocking the Node.js event loop. Upgrade to toml 5.0.1, which is listed as the fixed version.

Written 31 Oct 2026.

Not analysed yet

We haven’t published our analysis of this Advisory yet. Once a person has reviewed it, this page will say what’s vulnerable, what has to be true for your app to be affected, and how to check.

Severity and exploitation

Score	Rating	CVSS	Vector	Source
8.7	High	4.0	CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N	CNA (GitHub_M)

CISA KEV Not listed.
EPSS 0.0047, the 41st percentile, on 7 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

Timeline

31 Oct 2026, 13:33 UTC First seen by agentprime
31 Oct 2026, 13:33 UTC Confirmed by OSV

Sources

Facts on this page come from the GitHub Advisory Database (CC-BY 4.0), OSV and the other sources listed, as published. We don’t reproduce full advisory descriptions, which can contain exploit code.