CVE-2026-4599 | THREATINT

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.

PUBLISHED Reserved 2026-03-22 | Published 2026-03-23 | Updated 2026-03-23 | Assigner snyk

CRITICAL: 9.3CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N

CRITICAL: 9.1CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N

Problem types

Incomplete Comparison with Missing Factors

Credits

Kr0emer

References

security.snyk.io/vuln/SNYK-JS-JSRSASIGN-15370939

gist.github.com/Kr0emer/081681818b51605c91945126d74b4f20

github.com/kjur/jsrsasign/pull/647

github.com/...ommit/ee4b013478366cb16cea9a4bdfb218b6077f83b1

cve.org (CVE-2026-4599)

nvd.nist.gov (CVE-2026-4599)

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