Bug 2450206 (CVE-2026-4602) - CVE-2026-4602 jsrsasign: jsrsasign: Signature verification bypass via negative exponent handling
Summary: CVE-2026-4602 jsrsasign: jsrsasign: Signature verification bypass via negativ...
Keywords:
Status: NEW
Alias: CVE-2026-4602
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
high
high
Target Milestone: ---
Assignee: Product Security DevOps Team
QA Contact:
URL:
Whiteboard:
Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2026-03-23 06:01 UTC by OSIDB Bzimport
Modified: 2026-03-23 06:56 UTC (History)
2 users (show)

Fixed In Version:
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Description OSIDB Bzimport 2026-03-23 06:01:54 UTC 
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.
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