CVE-2026-2739 – Bouncy Castle BN JavaScript Infinite Loop Vulnerability

CVE ID : CVE-2026-2739

Published : Feb. 20, 2026, 5:17 a.m. | 1 hour, 43 minutes ago

Description : 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.

Severity: 5.5 | MEDIUM

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