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CVE-2026-4599 is an incomplete comparison vulnerability in jsrsasign affecting versions 7.0.0 through versions before 11.1.1. The flaw is in the getRandomBigIntegerZeroToMax and getRandomBigIntegerMinToMax functions in src/crypto-1.1.js, where incorrect compareTo checks can accept out-of-range values during random number generation. When these functions are used for DSA signature generation, the faulty bounds checking can bias the generated nonce values. Because DSA security depends on uniformly random nonces within the correct range, this bias can enable recovery of the DSA private key from observed signatures.
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