GHSA-9MRV-8PVF-HF4M

Vulnerability from github – Published: 2026-06-12 12:31 – Updated: 2026-08-20 18:32
VLAI
Summary
Apache CXF OAuth2 Missing JWT Audience and Issuer Validation in Access Token Validator
Details

The JwtAccessTokenValidator class in Apache CXF fails to validate the 'aud' (Audience) claims of incoming JWT access tokens. This allows a JWT issued for one Resource Server to be successfully replayed against a completely different Resource Server, leading to Token Confusion/Routing attacks. Users are recommended to upgrade to versions 4.2.2 or 4.1.7, which fixes this issue.

Severity
9.1 (Critical)
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H
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{
  "affected": [
    {
      "package": {
        "ecosystem": "Maven",
        "name": "org.apache.cxf:cxf-rt-rs-security-oauth2"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "4.2.0"
            },
            {
              "fixed": "4.2.2"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Maven",
        "name": "org.apache.cxf:cxf-rt-rs-security-oauth2"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "4.1.7"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2026-50627"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-289",
      "CWE-303"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2026-08-20T18:32:04Z",
    "nvd_published_at": "2026-06-12T10:16:22Z",
    "severity": "CRITICAL"
  },
  "details": "The JwtAccessTokenValidator class in Apache CXF fails to validate the \u0027aud\u0027 (Audience) claims of incoming JWT access tokens. This allows a JWT issued for one Resource Server to be successfully replayed against a completely different Resource Server, leading to Token Confusion/Routing attacks.\u00a0Users are recommended to upgrade to versions 4.2.2 or 4.1.7, which fixes this issue.",
  "id": "GHSA-9mrv-8pvf-hf4m",
  "modified": "2026-08-20T18:32:05Z",
  "published": "2026-06-12T12:31:33Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-50627"
    },
    {
      "type": "WEB",
      "url": "https://access.redhat.com/errata/RHSA-2026:37390"
    },
    {
      "type": "WEB",
      "url": "https://access.redhat.com/security/cve/CVE-2026-50627"
    },
    {
      "type": "WEB",
      "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2488298"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/apache/cxf"
    },
    {
      "type": "WEB",
      "url": "https://lists.apache.org/thread/0jfzz9q992957b99tw7hodcqjfyxwb1m"
    },
    {
      "type": "WEB",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-50627.json"
    },
    {
      "type": "WEB",
      "url": "http://www.openwall.com/lists/oss-security/2026/06/11/4"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ],
  "summary": "Apache CXF OAuth2 Missing JWT Audience and Issuer Validation in Access Token Validator"
}



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