Sign in
Deutsch English Español Polski
Critical

jsrsasign: Incomplete Comparison Allows DSA Private Key Recovery via Biased Nonce Generation

  • Disclosed: 23.03.2026
  • Updated: 11.10.2026 10:22

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

Click a technology to see all vulnerabilities affecting it.

PlatformPackageVulnerable versionsFixed in
npm package jsrsasign >= 7.0.0, < 11.1.1 11.1.1

References

CVSS score 9.1/10
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
Weakness (CWE)
CWE-1023, CWE-338
Platform
npm
Package
jsrsasign
Disclosed
23.03.2026
Updated
11.10.2026 10:22

Sources and licenses

OSV / GitHub Advisory Database - GHSA-5jx8-q4cp-rhh6 - CC BY 4.0

Vulnerability history: jsrsasign

All published vulnerabilities of this package (npm package), newest first. Shows whether this is a one-off slip or a package that needs watching.

All (14) in the archive
Total entries
14
First → latest
06.2020 03.2026
Without a fix
0
Exploited in attacks
0

Severity breakdown

  • Critical 4
  • High 7
  • Medium 2
  • Low 1

Disclosures per year

Severity:
  1. jsrsasign: DSA signatures or X.509 certificates can be forged via DSA domain-parameter validation in KJUR.crypto.DSA.setPublic
    High · 7.4 CVE-2026-4600 < 11.1.1 11.1.1
  2. jsrsasign: Negative Exponent Handling Leads to Signature Verification Bypass
    High · 7.5 CVE-2026-4602 < 11.1.1 11.1.1
  3. jsrsasign: Incomplete Comparison Allows DSA Private Key Recovery via Biased Nonce Generation this entry
    Critical · 9.1 CVE-2026-4599 >= 7.0.0, < 11.1.1 11.1.1
  4. jsrsasign is vulnerable to DoS through Infinite Loop when processing zero or negative inputs
    High · 7.5 CVE-2026-4598 < 11.1.1 11.1.1
  5. jsrsasign: Missing cryptographic validation during DSA signing enables private key extraction
    High · 8.7 CVE-2026-4601 < 11.1.1 11.1.1
  6. Marvin Attack of RSA and RSAOAEP decryption in jsrsasign
    High · 7.5 CVE-2024-21484 < 11.0.0 11.0.0
  7. JWS and JWT signature validation vulnerability with special characters
    High · 8.6 CVE-2022-25898 >= 4.8.0, < 10.5.25 10.5.25
  8. RSA signature validation vulnerability on maleable encoded message in jsrsasign
    Critical · 9.1 CVE-2021-30246 < 10.2.0 10.2.0
  9. ECDSA signature validation vulnerability by accepting wrong ASN.1 encoding in jsrsasign
    High · 7.5 CVE-2020-14966 >= 4.0.0, < 8.0.19 8.0.19
  10. RSA PKCS#1 decryption vulnerability with prepending zeros in jsrsasign
    Critical · 9.8 CVE-2020-14967 < 8.0.18 8.0.18
  11. RSA-PSS signature validation vulnerability by prepending zeros in jsrsasign
    Critical · 9.8 CVE-2020-14968 >= 3.0.0, < 8.0.17 8.0.17

Know which vulnerabilities affect your application

With the DockRay integration and software inventory enabled, DockRay checks reported component versions against known vulnerabilities and notifies you about confirmed matches. Coverage depends on the supported technology and available advisory data.

Connect your application
DockRay newsletter

Application security in your inbox

Important vulnerabilities, actionable guidance and practical advice for your applications. Choose your technologies and follow what matters to your project.

  • A daily digest of new vulnerabilities, critical ones included.
  • Notifications about important updates.
  • Practical advice on application security and monitoring.

Leave empty to receive updates for every technology.

Privacy policy

Free to subscribe. Unsubscribe with one click in any email.