Sign in
Deutsch English Español Polski
High

jsrsasign: DSA signatures or X.509 certificates can be forged via DSA domain-parameter validation in KJUR.crypto.DSA.setPublic

  • Disclosed: 23.03.2026
  • Updated: 11.10.2026 10:22

Versions of the package jsrsasign before 11.1.1 are vulnerable to Improper Verification of Cryptographic Signature via the DSA domain-parameter validation in KJUR.crypto.DSA.setPublic (and the related DSA/X509 verification flow in src/dsa-2.0.js). An attacker can forge DSA signatures or X.509 certificates that X509.verifySignature() accepts by supplying malicious domain parameters such as g=1, y=1, and a fixed r=1, which make the verification equation true for any hash.

Affected software

Click a technology to see all vulnerabilities affecting it.

PlatformPackageVulnerable versionsFixed in
npm package jsrsasign < 11.1.1 11.1.1

References

CVSS score 7.4/10
CVSS vector
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N
Weakness (CWE)
CWE-347
Platform
npm
Package
jsrsasign
Disclosed
23.03.2026
Updated
11.10.2026 10:22

Sources and licenses

OSV / GitHub Advisory Database - GHSA-wvqx-v3f6-w8rh - 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 this entry
    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
    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.