CVE WatchJul 15, 2026

CVE-2026-4602

Versions of the package jsrsasign before 11.1.1 are vulnerable to Incorrect Conversion between Numeric Types due to handling negative expone

CVSS

7.5

High

EPSS

0.5%

p39

KEV

—

Exploit Today

0-100

Published: Mar 23, 2026 · Last modified: Jul 15, 2026 · CWE-681

EPSS · 30d

0.5%EPSS · 30 days0.5%

2026-06-302026-07-16

Technical 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.

Official references

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