GHSA-5JX8-Q4CP-RHH6

Vulnerability from github – Published: 2026-03-23 06:30 – Updated: 2026-03-30 19:29
VLAI?
Summary
jsrsasign: Incomplete Comparison Allows DSA Private Key Recovery via Biased Nonce Generation
Details

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.

Severity ?
9.1 (Critical)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
9.3 (Critical)
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
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{
  "affected": [
    {
      "package": {
        "ecosystem": "npm",
        "name": "jsrsasign"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "7.0.0"
            },
            {
              "fixed": "11.1.1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2026-4599"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-1023"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2026-03-30T19:29:39Z",
    "nvd_published_at": "2026-03-23T06:16:21Z",
    "severity": "CRITICAL"
  },
  "details": "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.",
  "id": "GHSA-5jx8-q4cp-rhh6",
  "modified": "2026-03-30T19:29:39Z",
  "published": "2026-03-23T06:30:29Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-4599"
    },
    {
      "type": "WEB",
      "url": "https://github.com/kjur/jsrsasign/pull/647"
    },
    {
      "type": "WEB",
      "url": "https://github.com/kjur/jsrsasign/commit/ee4b013478366cb16cea9a4bdfb218b6077f83b1"
    },
    {
      "type": "WEB",
      "url": "https://gist.github.com/Kr0emer/081681818b51605c91945126d74b4f20"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/kjur/jsrsasign"
    },
    {
      "type": "WEB",
      "url": "https://security.snyk.io/vuln/SNYK-JS-JSRSASIGN-15370939"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N",
      "type": "CVSS_V3"
    },
    {
      "score": "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",
      "type": "CVSS_V4"
    }
  ],
  "summary": "jsrsasign: Incomplete Comparison Allows DSA Private Key Recovery via Biased Nonce Generation"
}


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