CVE-2026-4599
9.3
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N
Summary
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.
Affected Software
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| n/a | jsrsasign | 7.0.0 < 11.1.1 | affected |
| n/a | org.webjars.npm:jsrsasign | 8.0.12 < * | affected |
Weaknesses
- CWE-1023: Incomplete Comparison with Missing Factors
ADP Enrichment
CISA ADP Vulnrichment
- SSVC:
- Exploitation: none
- Automatable: yes
- Technical Impact: total
jsrsasign: jsrsasign: Private key recovery via incomplete comparison checks biasing DSA nonces
Additional References
- https://access.redhat.com/security/cve/CVE-2026-4599
- https://bugzilla.redhat.com/show_bug.cgi?id=2450207
- https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-4599.json
- https://access.redhat.com/errata/RHSA-2026:19409
- https://access.redhat.com/errata/RHSA-2026:19410
- https://access.redhat.com/errata/RHSA-2026:6912
- https://access.redhat.com/errata/RHSA-2026:6720
- https://access.redhat.com/errata/RHSA-2026:6568
- https://access.redhat.com/errata/RHSA-2026:19375
- https://access.redhat.com/errata/RHSA-2026:6926
References
- https://security.snyk.io/vuln/SNYK-JS-JSRSASIGN-15370939
- https://security.snyk.io/vuln/SNYK-JAVA-ORGWEBJARSNPM-15812264
- https://gist.github.com/Kr0emer/081681818b51605c91945126d74b4f20
- https://github.com/kjur/jsrsasign/pull/647
- https://github.com/kjur/jsrsasign/commit/ee4b013478366cb16cea9a4bdfb218b6077f83b1
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