GHSA-xffm-g5w8-qvg7

GHSA-xffm-g5w8-qvg7 · @eslint/plugin-kit is vulnerable to Regular Expression Denial of Service attacks through ConfigCommentParser

Cette page présente des faits issus de sources publiques. Consultez l’avis original avant toute mise à jour.

### Summary The `ConfigCommentParser#parseJSONLikeConfig` API is vulnerable to a Regular Expression Denial of Service (ReDoS) attack in its only argument. ### Details The regular expression at [packages/plugin-kit/src/config-comment-parser.js:158](https://github.com/eslint/rewrite/blob/bd4bf23c59f0e4886df671cdebd5abaeb1e0d916/packages/plugin-kit/src/config-comment-parser.js#L158) is vulnerable to a quadratic runtime attack because the grouped expression is not anchored. This can be solved by prepending the regular expression with `[^-a-zA-Z0-9/]`. ### PoC ```javascript const { ConfigCommentParser } = require("@eslint/plugin-kit"); const str = `${"A".repeat(1000000)}?: 1 B: 2`; console.log("start") var parser = new ConfigCommentParser(); console.log(parser.parseJSONLikeConfig(str)); console.log("end") // run `npm i @eslint/[email protected]` and `node attack.js` // then the program will stuck forever with high CPU usage ``` ### Impact This is a Regular Expression Denial of Service attack which may lead to blocking execution and high CPU usage.

CVSS 2.3 · Faible · Correctif disponible

Publication

2025-07-18T20:39:12Z

Mise à jour

2026-09-10T03:50:26.394042480Z

Pile logicielle: node

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