Apache ActiveMQ Broker, Apache ActiveMQ, Apache ActiveMQ All: Pre-authentication OpenWire DoS following fix for CVE-2026-49270

{
  "id": "b7acb6b641e71d2e6f52ac7535bdd30c409cdec296130c0d54e6a94096854301",
  "url": "https://osv.dev/vulnerability/CVE-2026-50750",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "Apache ActiveMQ Broker, Apache ActiveMQ, Apache ActiveMQ All: Pre-authentication OpenWire DoS following fix for CVE-2026-49270",
    "summary": "Denial of Service via Out of Memory vulnerability in Apache ActiveMQ Broker, Apache ActiveMQ, Apache ActiveMQ All. Following the fix for CVE-2026-49270 an unauthenticated attacker can now cause broker OOM by sending an repeated BrokerInfo commands without sending a ConnectionInfo, until the broker will crash with OOM. This issue affects Apache ActiveMQ Broker: from 5.19.7 before 5.19.8, from 6.2.6 before 6.2.7; Apache ActiveMQ: from 5.19.7 before 5.19.8, from 6.2.6 before 6.2.7; Apache ActiveMQ All: from 5.19.7 before 5.19.8, from 6.2.6 before 6.2.7. Users are recommended to upgrade to version 6.2.7, which fixes the issue.",
    "evidence": "osv:CVE-2026-50750",
    "products": [],
    "severity": "high",
    "structured": {
      "id": "CVE-2026-50750",
      "aliases": [
        "BIT-activemq-2026-50750",
        "CVE-2026-50750"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/apache/activemq",
              "type": "GIT",
              "events": [
                {
                  "introduced": "fa56d21ff2d14b99928917cc0bef2e8830acf15f"
                },
                {
                  "last_affected": "bb9523b9847fe235a971256fec7ce6bb5670d14d"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "cpe": "cpe:2.3:a:apache:activemq:5.19.7:*:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "5.19.7"
                      },
                      {
                        "last_affected": "5.19.7"
                      }
                    ],
                    "source": "CPE_STRING"
                  },
                  {
                    "cpe": "cpe:2.3:a:apache:activemq:6.2.6:*:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "6.2.6"
                      },
                      {
                        "last_affected": "6.2.6"
                      }
                    ],
                    "source": "CPE_STRING"
                  }
                ]
              }
            }
          ],
          "versions": [
            "5.19.7",
            "6.2.6"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-50750.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:49.038190815Z",
      "provider": "osv",
      "references": [
        "https://repo.maven.apache.org/maven2",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/50xxx/CVE-2026-50750.json",
        "https://lists.apache.org/thread/nhkmbdym61yp6wwy0dny8w1p46sm87kr",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-50750"
      ],
      "provider_metadata": {
        "cna_assigner": "apache",
        "unresolved_ranges": [
          {
            "extracted_events": [
              {
                "range": [
                  {
                    "introduced": "5.19.7"
                  },
                  {
                    "fixed": "5.19.8"
                  },
                  {
                    "introduced": "6.2.6"
                  },
                  {
                    "fixed": "6.2.7"
                  },
                  {
                    "introduced": "5.19.7"
                  },
                  {
                    "fixed": "5.19.8"
                  },
                  {
                    "introduced": "6.2.6"
                  },
                  {
                    "fixed": "6.2.7"
                  },
                  {
                    "introduced": "5.19.7"
                  },
                  {
                    "fixed": "5.19.8"
                  },
                  {
                    "introduced": "6.2.6"
                  },
                  {
                    "fixed": "6.2.7"
                  }
                ],
                "source": "AFFECTED_FIELD",
                "strategy": "StandardRange"
              }
            ]
          }
        ],
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/50xxx/CVE-2026-50750.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2026-50750",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 517555,
  "published_at": "2026-06-30T09:51:57.035+00:00"
}