PT-2026-27058

CVE-2026-4602

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Published

2026-03-23

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Updated

2026-08-17

Description by

CVSS 4.0
7.7
High
MetricsAV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:P
Name of the Vulnerable Software and Affected Versions jsrsasign versions prior to 11.1.1
Description Incorrect Conversion between Numeric Types occurs due to the handling of negative exponents in the file ext/jsbn2.js. An attacker can force the computation of incorrect modular inverses and break signature verification by calling the modPow() function with a negative exponent.
Recommendations Update to version 11.1.1 or later.
Exploitability
Exploit
Fix
Researchers
Vendors
Affected products
Weakness enumeration
CWE-681: Incorrect Conversion between Numeric Types
Related identifiers
CVE-2026-4602
GHSA-8QWJ-4JXW-M8JW
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