CVE-2026-4599
Critical · CVSS 9.1jsrsasign — Incomplete Comparison with Missing Factors leading to DSA nonce bias and private key recovery
- CVSS
- 9.1
- nvd
- EPSS
- 0.48%
- 39th pct
- KEV
- No
- Class
- oss containerizable
- CWE-1023, CWE-338
Description
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.
Search profile — drives PoC discovery
Symbols getRandomBigIntegerZeroToMaxgetRandomBigIntegerMinToMaxcompareTocrypto-1.1.jssrc/crypto-1.1.js
Keywords CVE-2026-4599jsrsasignDSA nonce biasprivate key recoverygetRandomBigIntegerZeroToMaxgetRandomBigIntegerMinToMaxcompareToCWE-1023SNYK-JS-JSRSASIGN-15370939jsrsasign 11.1.1jsrsasign DSA
Versions: >=7.0.0 <11.1.1
Affected packages
| npm | jsrsasign | 7.0.0 → 11.1.1 |
References
- https://gist.github.com/Kr0emer/081681818b51605c91945126d74b4f20
- https://github.com/kjur/jsrsasign/commit/ee4b013478366cb16cea9a4bdfb218b6077f83b1
- https://github.com/kjur/jsrsasign/pull/647
- https://security.snyk.io/vuln/SNYK-JAVA-ORGWEBJARSNPM-15812264
- https://security.snyk.io/vuln/SNYK-JS-JSRSASIGN-15370939
- https://access.redhat.com/errata/RHSA-2026:19375
- https://access.redhat.com/errata/RHSA-2026:19409
- https://access.redhat.com/errata/RHSA-2026:19410
- https://access.redhat.com/errata/RHSA-2026:6568
- https://access.redhat.com/errata/RHSA-2026:6720
- https://access.redhat.com/errata/RHSA-2026:6912
- https://access.redhat.com/errata/RHSA-2026:6926
Status: enriched · ingested 2026-06-22T06:00:15.000Z · profiled 2026-06-22T06:30:15.000Z