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Vulnerabilities
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CVE-2026-2739

Updated on 20 Feb 2026

Severity

5.5 Medium severity

Details

CVSS score
5.5
CVSS vector
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/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
CWE ID
Links
NISTCIRCLRHELUbuntu

Overview

About vulnerability

This affects versions of the package bn.js before 5.2.3. Calling maskn(0) on any BN instance corrupts the internal state, causing toString(), divmod(), and other methods to enter an infinite loop, hanging the process indefinitely.

Details

Affected product:
Acorn , AlmaLinux 9.2 ESU , Next.js , Node.js , TuxCare 9.6 ESU , babel-loader , bn.js , boxen , check-updates , cross-spawn , execa , extract-text-webpack-plugin , html-webpack-plugin , jpm , loopback , loopback-connector , loopback-connector-remote , loopback-datasource-juggler , loopback-phase , ng-packagr , npm , npx , nuxt , os-locale , preload-webpack-plugin , script-ext-html-webpack-plugin , semantic-release , semver , strong-globalize , strong-remoting , term-size , uglifyjs-webpack-plugin , update-notifier , webpack , webpack-dev-middleware , webpack-dev-server , yargs
Affected packages:
next @ 9.5.5 (+63 more)
This affects versions of the package bn.js before 5.2.3. Calling maskn(0) on any BN instance corrupts the internal state, causing toString(), divmod(), and other methods to enter an infinite loop, hanging the process indefinitely.

Fixes