CVE-2026-4599: jsrsasign: Incomplete Comparison Allows DSA Private Key Recovery via Biased Nonce Generation
(updated )
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.
References
- access.redhat.com/errata/RHSA-2026:19375
- access.redhat.com/errata/RHSA-2026:19409
- access.redhat.com/errata/RHSA-2026:19410
- access.redhat.com/errata/RHSA-2026:6568
- access.redhat.com/errata/RHSA-2026:6720
- access.redhat.com/errata/RHSA-2026:6912
- access.redhat.com/errata/RHSA-2026:6926
- access.redhat.com/security/cve/CVE-2026-4599
- bugzilla.redhat.com/show_bug.cgi?id=2450207
- gist.github.com/Kr0emer/081681818b51605c91945126d74b4f20
- github.com/advisories/GHSA-5jx8-q4cp-rhh6
- github.com/kjur/jsrsasign/commit/ee4b013478366cb16cea9a4bdfb218b6077f83b1
- github.com/kjur/jsrsasign/pull/647
- nvd.nist.gov/vuln/detail/CVE-2026-4599
- security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-4599.json
- security.snyk.io/vuln/SNYK-JAVA-ORGWEBJARSNPM-15812264
- security.snyk.io/vuln/SNYK-JS-JSRSASIGN-15370939
Code Behaviors & Features
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