{
  "schemaVersion": 1,
  "attribution": [
    {
      "source": "CISA Known Exploited Vulnerabilities",
      "url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog",
      "licence": "US government work"
    },
    {
      "source": "GitHub Advisory Database",
      "url": "https://github.com/advisories",
      "licence": "CC BY 4.0"
    },
    {
      "source": "Have I Been Pwned",
      "url": "https://haveibeenpwned.com/",
      "licence": "CC BY 4.0"
    },
    {
      "source": "CVE Program (CVE records)",
      "url": "https://www.cve.org/Legal/TermsOfUse",
      "licence": "CVE Terms of Use",
      "notice": "Copyright © 1999-2026, The MITRE Corporation. CVE is a trademark and the CVE logo is a registered trademark of The MITRE Corporation.",
      "terms": "CVE Usage: MITRE hereby grants you a perpetual, worldwide, non-exclusive, no-charge, royalty-free, irrevocable copyright license to reproduce, prepare derivative works of, publicly display, publicly perform, sublicense, and distribute Common Vulnerabilities and Exposures (CVE™). Any copy you make for such purposes is authorized provided that you reproduce MITRE's copyright designation and this license in any such copy."
    },
    {
      "source": "FIRST EPSS",
      "url": "https://www.first.org/epss/",
      "licence": "free to use; FIRST requests attribution"
    }
  ],
  "record": {
    "id": "CVE-2026-27446",
    "sourceURL": "https://www.cve.org/CVERecord?id=CVE-2026-27446",
    "idYear": 2026,
    "status": "PUBLISHED",
    "publishedAt": "2026-03-04T08:48:48.199Z",
    "updatedAt": "2026-09-18T12:04:44.095Z",
    "importedAt": "2026-10-24T01:58:02.025Z",
    "snapshot": {
      "id": "cve_2026-10-24_midnight_baseline",
      "at": "2026-10-24T00:00:00.000Z",
      "source": "https://github.com/CVEProject/cvelistV5/releases/tag/cve_2026-10-24_0100Z"
    },
    "facts": {
      "title": "Apache Artemis, Apache ActiveMQ Artemis: Auth bypass for Core downstream federation",
      "summary": "Missing Authentication for Critical Function (CWE-306) vulnerability in Apache Artemis, Apache ActiveMQ Artemis. An unauthenticated remote attacker can use the Core protocol to force a target broker to establish an outbound Core federation connection to an attacker-controlled rogue broker. This could potentially result in message injection into any queue and/or message exfiltration from any queue via the rogue broker. This impacts environments that allow both:\n\n- incoming Core protocol connections from untrusted sources to the broker\n\n- outgoing Core protocol connections from the broker to untrusted targets\n\nThis issue affects:\n\n- Apache Artemis from 2.50.0 through 2.51.0\n\n- Apache ActiveMQ Artemis from 2.11.0 through 2.44.0.\n\nUsers are recommended to upgrade to Apache Artemis version 2.52.0, which fixes the issue.\n\nThe issue can be mitigated by one of the following:\n\n- Remove Core protocol support from any acceptor receiving connections from untrusted sources. Incoming Core protocol connections are supported by default via the \"artemis\" acceptor listening on port 61616. See the \"protocols\" URL parameter configured for the acceptor. An acceptor URL without this parameter supports all protocols by default, including Core.\n\n- Use two-way SSL (i.e. certificate-based authentication) in order to force every client to present the proper SSL certificate when establishing a connection before any message protocol handshake is attempted. This will prevent unauthenticated exploitation of this vulnerability.\n\n- Implement and deploy a Core interceptor to deny all Core downstream federation connect packets. Such packets have a type of (int) -16 or (byte) 0xfffffff0. Documentation for interceptors is available at  https://artemis.apache.org/components/artemis/documentation/latest/intercepting-operations.html .",
      "affected": [
        {
          "vendor": "Apache Software Foundation",
          "product": "Apache Artemis",
          "packageName": "org.apache.artemis:artemis-server",
          "collectionURL": "https://repo.maven.apache.org/maven2",
          "defaultStatus": "unaffected",
          "versions": [
            {
              "version": "2.50.0",
              "status": "affected",
              "versionType": "semver",
              "lessThanOrEqual": "2.51.0"
            }
          ]
        },
        {
          "vendor": "Apache Software Foundation",
          "product": "Apache ActiveMQ Artemis",
          "packageName": "org.apache.activemq:artemis-server",
          "collectionURL": "https://repo.maven.apache.org/maven2",
          "defaultStatus": "unaffected",
          "versions": [
            {
              "version": "2.11.0",
              "status": "affected",
              "versionType": "semver",
              "lessThanOrEqual": "2.44.0"
            }
          ]
        }
      ]
    }
  }
}