CriticalGHSA-5jx8-q4cp-rhh6CVE-2026-4599

jsrsasign: Incomplete Comparison Allows DSA Private Key Recovery via Biased Nonce Generation

Published 23 Mar 2026 · Updated 21 Jul 2026

Affected package

Affected: >=7.0.0 <11.1.1
Fixed in: 11.1.1

Update to the fixed version for your release line, for example:npm install jsrsasign@11.1.1

Details

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.

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References

Advisory data from OSV.dev (opens OSV.dev in a new tab), refreshed daily.