Vulnerability · Published Sep 3, 2026 · Assigned by GitHub_M
CVE-2026-77465toml-node: Uncontrolled Recursion
High 7.5
In plain English
A high-severity security flaw in toml-node from BinaryMuse. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.6% (higher than 49% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Official description
toml-node is a TOML parser for Node.js and the browser. Prior to 4.2.0, toml.parse() uses a Peggy 5.1.0 generated recursive-descent parser in lib/parser.js whose peg$parsevalue, peg$parsearray, and peg$parseinline_table_entry functions recurse through nested arrays and inline tables without a depth limit. A remote unauthenticated application parsing an attacker-controlled TOML document containing a few thousand nested arrays or inline tables can exhaust the Node.js call stack, raise an unexpected RangeError rather than the parser's SyntaxError, and terminate an unprotected request worker or process. The corresponding grammar source is src/toml.pegjs, where the generated parser must be bounded. This issue is fixed in version 4.2.0.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| npm | toml | 4.2.0 | GHSA-82x6-q7mm-w9cf |
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| BinaryMuse | toml-node | < 4.2.0 |
Weakness: CWE-674 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
References
- https://github.com/BinaryMuse/toml-node/security/advisories/GHSA-82x6-q7mm-w9cf x_refsource_CONFIRM
- https://github.com/BinaryMuse/toml-node/pull/72 x_refsource_MISC
- https://github.com/BinaryMuse/toml-node/commit/967b8b06754f3ecd9863cea118dc50792a8c353f x_refsource_MISC