CVE-2026-67414 (GCVE-0-2026-67414)

Vulnerability from cvelistv5 – Published: 2026-10-14 16:04 – Updated: 2026-10-14 16:04
VLAI
Title
RabbitMQ AMQP 1.0 parser: amplification memory-exhaustion DoS via zero-width array aggregation
Summary
RabbitMQ is a messaging and streaming broker. From 4.0.0 until 4.0.24, 4.1.15, 4.2.10, and 4.3.4, deps/amqp10_common/src/amqp10_binary_parser.erl materializes each element of AMQP 1.0 arrays whose shared constructor has zero width, while limiting only the number of elements in each array and not the aggregate arrays in a frame. After completing SASL authentication, a low-privilege client can send an ordinary frame containing many individually permitted arrays, causing a small frame to expand into a very large reader-process heap before later frame validation or authorization. Because deps/rabbit/src/rabbit_amqp_reader.erl clears the pre-authentication max_heap_size guard after login, repeated or concurrent frames can trigger the node-wide memory alarm, block publishers, or exhaust broker memory. This issue is fixed in versions 4.0.24, 4.1.15, 4.2.10, and 4.3.4.
Severity
6 (Medium)
CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
CWE
  • CWE-400 - Uncontrolled Resource Consumption
  • CWE-770 - Allocation of Resources Without Limits or Throttling
Assigner
GitHub_M CNA under the mitre root
CNA scorecard C 72/100 over 7771 records in the last 180 days details
References
Impacted products
Vendor Product Version CPE status
rabbitmq rabbitmq-server Affected: >= 4.0.0, < 4.0.24
Affected: >= 4.1.0, < 4.1.15
Affected: >= 4.2.0, < 4.2.10
Affected: >= 4.3.0, < 4.3.4
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{
  "containers": {
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        {
          "product": "rabbitmq-server",
          "vendor": "rabbitmq",
          "versions": [
            {
              "status": "affected",
              "version": "\u003e= 4.0.0, \u003c 4.0.24"
            },
            {
              "status": "affected",
              "version": "\u003e= 4.1.0, \u003c 4.1.15"
            },
            {
              "status": "affected",
              "version": "\u003e= 4.2.0, \u003c 4.2.10"
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          "value": "RabbitMQ is a messaging and streaming broker. From 4.0.0 until 4.0.24, 4.1.15, 4.2.10, and 4.3.4, deps/amqp10_common/src/amqp10_binary_parser.erl materializes each element of AMQP 1.0 arrays whose shared constructor has zero width, while limiting only the number of elements in each array and not the aggregate arrays in a frame. After completing SASL authentication, a low-privilege client can send an ordinary frame containing many individually permitted arrays, causing a small frame to expand into a very large reader-process heap before later frame validation or authorization. Because deps/rabbit/src/rabbit_amqp_reader.erl clears the pre-authentication max_heap_size guard after login, repeated or concurrent frames can trigger the node-wide memory alarm, block publishers, or exhaust broker memory. This issue is fixed in versions 4.0.24, 4.1.15, 4.2.10, and 4.3.4."
        }
      ],
      "metrics": [
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            "baseScore": 6,
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            "privilegesRequired": "LOW",
            "subAvailabilityImpact": "NONE",
            "subConfidentialityImpact": "NONE",
            "subIntegrityImpact": "NONE",
            "userInteraction": "NONE",
            "vectorString": "CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N",
            "version": "4.0",
            "vulnAvailabilityImpact": "HIGH",
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          ]
        },
        {
          "descriptions": [
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              "description": "CWE-770: Allocation of Resources Without Limits or Throttling",
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              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-10-14T16:04:07.449Z",
        "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
        "shortName": "GitHub_M"
      },
      "references": [
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          "name": "https://github.com/rabbitmq/rabbitmq-server/security/advisories/GHSA-w6mq-4qpx-v7mh",
          "tags": [
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          ],
          "url": "https://github.com/rabbitmq/rabbitmq-server/security/advisories/GHSA-w6mq-4qpx-v7mh"
        },
        {
          "name": "https://github.com/rabbitmq/rabbitmq-server/commit/3f0f67dfb7c4390e3cbfa25ab3ee19dcb0845bd4",
          "tags": [
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          "url": "https://github.com/rabbitmq/rabbitmq-server/commit/3f0f67dfb7c4390e3cbfa25ab3ee19dcb0845bd4"
        },
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          "name": "https://github.com/rabbitmq/rabbitmq-server/releases/tag/v4.3.4",
          "tags": [
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          "url": "https://github.com/rabbitmq/rabbitmq-server/releases/tag/v4.3.4"
        }
      ],
      "source": {
        "advisory": "GHSA-w6mq-4qpx-v7mh",
        "discovery": "UNKNOWN"
      },
      "title": "RabbitMQ AMQP 1.0 parser: amplification memory-exhaustion DoS via zero-width array aggregation"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
    "assignerShortName": "GitHub_M",
    "cveId": "CVE-2026-67414",
    "datePublished": "2026-10-14T16:04:07.449Z",
    "dateReserved": "2026-07-29T15:02:20.412Z",
    "dateUpdated": "2026-10-14T16:04:07.449Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
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      "percentile": "0.44375"
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    "nvd": {
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                "product": "rabbitmq-server",
                "vendor": "rabbitmq",
                "versions": [
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                    "status": "affected",
                    "version": "\u003e= 4.0.0, \u003c 4.0.24"
                  },
                  {
                    "status": "affected",
                    "version": "\u003e= 4.1.0, \u003c 4.1.15"
                  },
                  {
                    "status": "affected",
                    "version": "\u003e= 4.2.0, \u003c 4.2.10"
                  },
                  {
                    "status": "affected",
                    "version": "\u003e= 4.3.0, \u003c 4.3.4"
                  }
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            "source": "security-advisories@github.com"
          }
        ],
        "cveTags": [],
        "descriptions": [
          {
            "lang": "en",
            "value": "RabbitMQ is a messaging and streaming broker. From 4.0.0 until 4.0.24, 4.1.15, 4.2.10, and 4.3.4, deps/amqp10_common/src/amqp10_binary_parser.erl materializes each element of AMQP 1.0 arrays whose shared constructor has zero width, while limiting only the number of elements in each array and not the aggregate arrays in a frame. After completing SASL authentication, a low-privilege client can send an ordinary frame containing many individually permitted arrays, causing a small frame to expand into a very large reader-process heap before later frame validation or authorization. Because deps/rabbit/src/rabbit_amqp_reader.erl clears the pre-authentication max_heap_size guard after login, repeated or concurrent frames can trigger the node-wide memory alarm, block publishers, or exhaust broker memory. This issue is fixed in versions 4.0.24, 4.1.15, 4.2.10, and 4.3.4."
          }
        ],
        "id": "CVE-2026-67414",
        "lastModified": "2026-10-16T16:00:33.533",
        "metrics": {
          "cvssMetricV40": [
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              "cvssData": {
                "Automatable": "NOT_DEFINED",
                "Recovery": "NOT_DEFINED",
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                "attackVector": "NETWORK",
                "availabilityRequirement": "NOT_DEFINED",
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                "confidentialityRequirement": "NOT_DEFINED",
                "exploitMaturity": "NOT_DEFINED",
                "integrityRequirement": "NOT_DEFINED",
                "modifiedAttackComplexity": "NOT_DEFINED",
                "modifiedAttackRequirements": "NOT_DEFINED",
                "modifiedAttackVector": "NOT_DEFINED",
                "modifiedPrivilegesRequired": "NOT_DEFINED",
                "modifiedSubAvailabilityImpact": "NOT_DEFINED",
                "modifiedSubConfidentialityImpact": "NOT_DEFINED",
                "modifiedSubIntegrityImpact": "NOT_DEFINED",
                "modifiedUserInteraction": "NOT_DEFINED",
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                "modifiedVulnConfidentialityImpact": "NOT_DEFINED",
                "modifiedVulnIntegrityImpact": "NOT_DEFINED",
                "privilegesRequired": "LOW",
                "providerUrgency": "NOT_DEFINED",
                "subAvailabilityImpact": "NONE",
                "subConfidentialityImpact": "NONE",
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                "userInteraction": "NONE",
                "valueDensity": "NOT_DEFINED",
                "vectorString": "CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X",
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                "vulnerabilityResponseEffort": "NOT_DEFINED"
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            "url": "https://github.com/rabbitmq/rabbitmq-server/commit/3f0f67dfb7c4390e3cbfa25ab3ee19dcb0845bd4"
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            "source": "security-advisories@github.com",
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            "source": "security-advisories@github.com",
            "url": "https://github.com/rabbitmq/rabbitmq-server/security/advisories/GHSA-w6mq-4qpx-v7mh"
          }
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        "vulnStatus": "Awaiting Analysis",
        "weaknesses": [
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      "current_release_date": "2026-10-17T03:52:01+00:00",
      "cve": "CVE-2026-67414",
      "id": "CVE-2026-67414",
      "initial_release_date": "2026-10-14T16:04:07.449000+00:00",
      "product_status:fixed": "4",
      "product_status:known_affected": "8",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "rabbitmq-server: rabbitmq-server: Denial of Service via memory exhaustion in AMQP parser",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-67414.json",
      "version": "3"
    }
  }
}



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