GHSA-9GXV-X7RP-R2HC

Vulnerability from github – Published: 2024-05-15 21:47 – Updated: 2026-07-16 18:46
VLAI
Summary
gree/jose - "None" Algorithm treated as valid in tokens
Details

Several widely-used JSON Web Token (JWT) libraries, including node-jsonwebtoken, pyjwt, namshi/jose, php-jwt, and jsjwt, are affected by critical vulnerabilities that could allow attackers to bypass the verification step when using asymmetric keys (RS256, RS384, RS512, ES256, ES384, ES512).

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{
  "affected": [
    {
      "package": {
        "ecosystem": "Packagist",
        "name": "gree/jose"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "2.2.1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [],
  "database_specific": {
    "cwe_ids": [
      "CWE-327",
      "CWE-347"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2024-05-15T21:47:39Z",
    "nvd_published_at": null,
    "severity": "CRITICAL"
  },
  "details": "Several widely-used JSON Web Token (JWT) libraries, including node-jsonwebtoken, pyjwt, namshi/jose, php-jwt, and jsjwt, are affected by critical vulnerabilities that could allow attackers to bypass the verification step when using asymmetric keys (RS256, RS384, RS512, ES256, ES384, ES512).",
  "id": "GHSA-9gxv-x7rp-r2hc",
  "modified": "2026-07-16T18:46:45Z",
  "published": "2024-05-15T21:47:39Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://auth0.com/blog/2015/03/31/critical-vulnerabilities-in-json-web-token-libraries"
    },
    {
      "type": "WEB",
      "url": "https://auth0.com/blog/critical-vulnerabilities-in-json-web-token-libraries"
    },
    {
      "type": "WEB",
      "url": "https://github.com/FriendsOfPHP/security-advisories/blob/master/gree/jose/2016-08-30.yaml"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/nov/jose-php"
    },
    {
      "type": "WEB",
      "url": "https://github.com/nov/jose-php/compare/2.2.0...2.2.1"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [],
  "summary": "gree/jose - \"None\" Algorithm treated as valid in tokens"
}



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