CVE-2026-4600

HIGH EPSS 4.9%
Published Mar 23, 20263mo ago · Modified Jun 22, 20261w ago
8.1 CVSS 4.0
High
Find Similar
Published Mar 23, 2026 3mo ago
Last Modified Jun 22, 2026 1w ago

Description

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.

CVSS Details

Base Score
8.1
Exploitability
—
Impact
—
Vector string
CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Attack Vector Network
Attack Complexity High
Privileges Required None
User Interaction None
Scope X

Threat Intelligence

EPSS Exploit Probability
4.9% percentile
Exploit & Patch Status
Public Exploit Known
Patch Available

Weaknesses 1

CWE-347

Affected Products 1

VendorProductVersionRange
kjurjsrsasign* <11.1.1

References 4

  • gist.github.com https://gist.github.com/Kr0emer/bf15ddc097176e951659a24a8e9002a7
    ExploitMitigationThird Party Advisory
  • github.com https://github.com/kjur/jsrsasign/commit/37b4c06b145c7bfd6bc2a6df5d0a12c56b15ef60
    Patch
  • github.com https://github.com/kjur/jsrsasign/pull/646
    Issue Tracking
  • security.snyk.io https://security.snyk.io/vuln/SNYK-JS-JSRSASIGN-15370940
    Third Party Advisory

Remediation

  • github.com https://github.com/kjur/jsrsasign/commit/37b4c06b145c7bfd6bc2a6df5d0a12c56b15ef60
    Patch