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GHSA-5357-C2JX-V7QH

Vulnerability from github – Published: 2024-06-09 21:30 – Updated: 2025-11-03 18:31
VLAI
Summary
Authlib has algorithm confusion with asymmetric public keys
Details

lepture Authlib before 1.3.1 has algorithm confusion with asymmetric public keys. Unless an algorithm is specified in a jwt.decode call, HMAC verification is allowed with any asymmetric public key. (This is similar to CVE-2022-29217 and CVE-2024-33663.)

Severity
7.4 (High)
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N
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{
  "affected": [
    {
      "package": {
        "ecosystem": "PyPI",
        "name": "authlib"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "1.3.1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2024-37568"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-284",
      "CWE-327",
      "CWE-347"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2024-06-10T15:59:18Z",
    "nvd_published_at": "2024-06-09T19:15:52Z",
    "severity": "HIGH"
  },
  "details": "lepture Authlib before 1.3.1 has algorithm confusion with asymmetric public keys. Unless an algorithm is specified in a jwt.decode call, HMAC verification is allowed with any asymmetric public key. (This is similar to CVE-2022-29217 and CVE-2024-33663.)",
  "id": "GHSA-5357-c2jx-v7qh",
  "modified": "2025-11-03T18:31:14Z",
  "published": "2024-06-09T21:30:33Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2024-37568"
    },
    {
      "type": "WEB",
      "url": "https://github.com/lepture/authlib/issues/654"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/lepture/authlib"
    },
    {
      "type": "WEB",
      "url": "https://github.com/pypa/advisory-database/tree/main/vulns/authlib/PYSEC-2024-52.yaml"
    },
    {
      "type": "WEB",
      "url": "https://lists.debian.org/debian-lts-announce/2025/10/msg00032.html"
    },
    {
      "type": "WEB",
      "url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/FHJI32SN4FNAUVNALVGOKWHNSQ6XS3M5"
    },
    {
      "type": "WEB",
      "url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/IZI7HYGN7VZAYFV6UV3SRLYF7QGERXIU"
    },
    {
      "type": "WEB",
      "url": "https://www.vicarius.io/vsociety/posts/algorithm-confusion-in-lepture-authlib-cve-2024-37568"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N",
      "type": "CVSS_V3"
    }
  ],
  "summary": "Authlib has algorithm confusion with asymmetric public keys"
}



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