RabbitMQ: Federation and Shovel Gen-Servers Lack format_status Callback — Plaintext Credentials Exposed in Crash Dumps and sys:get_status

{
  "id": "42485ed82483be6bf597cb10e0b77bcb86d0a25f0e2dc6cf4c5d29f8f008655c",
  "url": "https://osv.dev/vulnerability/CVE-2026-67406",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "RabbitMQ: Federation and Shovel Gen-Servers Lack format_status Callback — Plaintext Credentials Exposed in Crash Dumps and sys:get_status",
    "summary": "RabbitMQ is a messaging and streaming broker. From 4.0.0 until 4.3.3, 4.2.9, 4.1.14, and 4.0.23, Shovel does not format state logged by the crash reporter and can leave unencrypted credentials in a crash dump file. the shovel worker genserver processes does not implement the formatstatus/2 callback. When these processes crash (e.g., due to network partitions, connection failures), the OTP SASL error handler writes the full process state , including plaintext AMQP passwords and URIs , to the error log. This is particularly severe for the shovel worker, which stores deobfuscated plaintext URIs (including amqp://user:password@host format) in its genserver state for the entire process Automatic Credential Exposure: Shovel worker crashes (common during network partitions) automatically write plaintext upstream/downstream passwords to error logs No Special Configuration Needed: Unlike DEBUG logging, SASL error reports are always active Broad. This issue is fixed in versions 4.3.3, 4.2.9, 4.1.14, and 4.0.23.",
    "evidence": "osv:CVE-2026-67406",
    "products": [],
    "severity": "medium",
    "structured": {
      "id": "CVE-2026-67406",
      "aliases": [
        "BIT-rabbitmq-2026-67406",
        "CVE-2026-67406",
        "GHSA-q44f-9vc5-grh7"
      ],
      "metrics": [
        {
          "type": "CVSS_V4",
          "score": "CVSS:4.0/AV:N/AC:L/AT:P/PR:H/UI:N/VC:N/VI:N/VA:N/SC:H/SI:N/SA:N"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/rabbitmq/rabbitmq-server",
              "type": "GIT",
              "events": [
                {
                  "introduced": "95c501fbad76c66156346cf364d158d6e30aa4d9"
                },
                {
                  "fixed": "47d6d6457c7d1a440daed643cb7d76bba313e79c"
                },
                {
                  "introduced": "1929eeadf9b2bac12c5434fb56884ef27370580e"
                },
                {
                  "fixed": "1d284b2d2a1e2f845ad22b0d5ee38ec372d50802"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "cpe": "cpe:2.3:a:broadcom:rabbitmq_server:*:*:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "4.2.0"
                      },
                      {
                        "fixed": "4.2.9"
                      }
                    ],
                    "source": "CPE_RANGE"
                  },
                  {
                    "cpe": "cpe:2.3:a:broadcom:rabbitmq_server:*:*:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "4.3.0"
                      },
                      {
                        "fixed": "4.3.3"
                      }
                    ],
                    "source": "CPE_RANGE"
                  },
                  {
                    "range": [
                      {
                        "fixed": "47d6d6457c7d1a440daed643cb7d76bba313e79c"
                      }
                    ],
                    "source": "REFERENCES_TAG",
                    "original_tag": "v4.2.9"
                  },
                  {
                    "range": [
                      {
                        "fixed": "1d284b2d2a1e2f845ad22b0d5ee38ec372d50802"
                      }
                    ],
                    "source": "REFERENCES_TAG",
                    "original_tag": "v4.3.3"
                  }
                ]
              }
            }
          ],
          "versions": [
            "v4.2.8",
            "v4.3.2",
            "v4.2.7",
            "v4.3.1",
            "v4.2.6",
            "v4.3.0",
            "v4.2.5",
            "v4.2.4",
            "v4.2.3",
            "v4.2.2",
            "v4.2.1",
            "v4.2.0"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-67406.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:30.325183769Z",
      "provider": "osv",
      "references": [
        "https://github.com/rabbitmq/rabbitmq-server/releases/tag/v4.2.9",
        "https://github.com/rabbitmq/rabbitmq-server/releases/tag/v4.3.3",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/67xxx/CVE-2026-67406.json",
        "https://github.com/rabbitmq/rabbitmq-server/security/advisories/GHSA-q44f-9vc5-grh7",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-67406"
      ],
      "provider_metadata": {
        "cwe_ids": [
          "CWE-200"
        ],
        "cna_assigner": "GitHub_M",
        "unresolved_ranges": [
          {
            "extracted_events": [
              {
                "range": [
                  {
                    "introduced": "4.1.0"
                  },
                  {
                    "fixed": "4.1.14"
                  },
                  {
                    "introduced": "4.0.0"
                  },
                  {
                    "fixed": "4.0.23"
                  }
                ],
                "source": "AFFECTED_FIELD",
                "strategy": "StringRangeExpression"
              }
            ]
          }
        ],
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/67xxx/CVE-2026-67406.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2026-67406",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 497326,
  "published_at": "2026-09-25T16:34:06.122+00:00"
}