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CVE-2026-4602

HIGH CVSS: 7.5 Published: 2026-03-23 Modified: 2026-08-17

Description

Versions of the package jsrsasign before 11.1.1 are vulnerable to Incorrect Conversion between Numeric Types due to handling negative exponents in ext/jsbn2.js. An attacker can force the computation of incorrect modular inverses and break signature verification by calling modPow with a negative exponent.

Affected Platforms

Kjur Jsrsasign

Weakness Type

CWE-681, CWE-681

References