p PatchFirst

CVE-2026-2739

CVE-2026-2739

This page contains facts from public vulnerability sources. Check the original advisory before updating.

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.

CVSS 6.9 · Medium · EPSS 0.5% · Fix available

Published
Updated

Stack: system · node

Affected products and versions

  • bn.js

    Versions
    • ≥ 0, < 5.2.3: Affected (semver)

    Update to 5.2.3

  • node-bn.js Debian:12

    Versions
    • 5.2.1+~5.1.1-1
    • 5.2.3+~5.2.0-1
    • 5.2.5+~5.2.0-1
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • node-bn.js Debian:13

    Versions
    • 5.2.1+~5.1.1-1
    • 5.2.3+~5.2.0-1
    • 5.2.5+~5.2.0-1
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • node-bn.js Debian:14

    Versions
    • 5.2.1+~5.1.1-1
    Affected ranges
    • ECOSYSTEM: < 5.2.3+~5.2.0-1

    Update to 5.2.3+~5.2.0-1

  • bn.js npm

    Affected ranges
    • SEMVER: < 4.12.3

    Update to 4.12.3

  • bn.js npm

    Affected ranges
    • SEMVER: ≥ 5.0.0, < 5.2.3

    Update to 5.2.3

  • node-bn.js Ubuntu:18.04:LTS

    Versions
    • 4.11.8-1
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • node-bn.js Ubuntu:20.04:LTS

    Versions
    • 5.0.0-1
    • 5.0.0-2
    • 5.1.1-1
    • 5.1.1-2
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • node-bn.js Ubuntu:22.04:LTS

    Versions
    • 5.1.3-1
    • 5.2.0-3
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • node-bn.js Ubuntu:24.04:LTS

    Versions
    • 5.2.1+~5.1.1-1
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • node-bn.js Ubuntu:25.10

    Versions
    • 5.2.1+~5.1.1-1
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • node-bn.js Ubuntu:26.10

    Versions
    • 5.2.3+~5.2.0-1
    • 5.2.5+~5.2.0-1
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • node-bn.js Ubuntu:26.04:LTS

    Versions
    • 5.2.1+~5.1.1-1
    • 5.2.3+~5.2.0-1
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

Original sources

Check your server →