Bug 2450207 (CVE-2026-4599)

Summary: CVE-2026-4599 jsrsasign: jsrsasign: Private key recovery via incomplete comparison checks biasing DSA nonces
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security DevOps Team <prodsec-dev>
Status: NEW --- QA Contact:
Severity: high Docs Contact:
Priority: high    
Version: unspecifiedCC: bdettelb, doconnor
Target Milestone: ---Keywords: Security
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Hardware: All   
OS: Linux   
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A flaw was found in jsrsasign. An attacker can exploit an incomplete comparison vulnerability in the getRandomBigIntegerZeroToMax and getRandomBigIntegerMinToMax functions. By manipulating incorrect comparison checks, an attacker can bias the Digital Signature Algorithm (DSA) nonces during signature generation. This allows the attacker to recover the private key, leading to a critical security compromise.
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oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:
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Description OSIDB Bzimport 2026-03-23 06:01:59 UTC 
Versions of the package jsrsasign from 7.0.0 and before 11.1.1 are vulnerable to Incomplete Comparison with Missing Factors via the getRandomBigIntegerZeroToMax and getRandomBigIntegerMinToMax functions in src/crypto-1.1.js; an attacker can recover the private key by exploiting the incorrect compareTo checks that accept out-of-range candidates and thus bias DSA nonces during signature generation.