MediumFix available

RabbitMQ: Authenticated RabbitMQ JMS Topic Selector Users Can Consume Broker CPU with an Unbounded LIKE Regular Expression

Type: advisorySources: OSV

RabbitMQ is a messaging and streaming broker. From 4.0.0 until 4.0.23, 4.1.14, 4.2.9, and 4.3.3, the optional rabbitmq_jms_topic_exchange plugin's x-jms-topic exchange accepted a client-controlled rjms_erlang_selector binding expression whose LIKE evaluator expanded percent and underscore wildcards into overlapping PCRE fragments. It executed those fragments with raw re:run/3 without match or recursion limits, allowing an authenticated tenant that can bind and publish to consume broker scheduler CPU and deny service with pathological selectors. This issue is fixed in versions 4.0.23, 4.1.14, 4.2.9, and 4.3.3.

Products: rabbitmq
Affected versions: Not specified
Fixed versions: 4.0.23, 4.1.14, 4.2.9, 4.3.3
CVEs: CVE-2026-67413
Confirmed fixed CVEs: Not specified
Updated in this feed: 30 Oct 2026, 23:59 UTC · Revision 1

Source evidence

RabbitMQ: Authenticated RabbitMQ JMS Topic Selector Users Can Consume Broker CPU with an Unbounded LIKE Regular Expression

core-osv · Original source

Published 1 Oct 2026, 09:33 UTC

osv:BIT-rabbitmq-2026-67413

rabbitmq

Fixed versions: 4.0.23, 4.1.14, 4.2.9, 4.3.3

Complete source record

{
  "id": "d9c20c39e09d7f943c240bc10279c21e24d3ce3d9cccd75ea18f6e3d19aef80f",
  "url": "https://osv.dev/vulnerability/BIT-rabbitmq-2026-67413",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "RabbitMQ: Authenticated RabbitMQ JMS Topic Selector Users Can Consume Broker CPU with an Unbounded LIKE Regular Expression",
    "summary": "RabbitMQ is a messaging and streaming broker. From 4.0.0 until 4.0.23, 4.1.14, 4.2.9, and 4.3.3, the optional rabbitmq_jms_topic_exchange plugin's x-jms-topic exchange accepted a client-controlled rjms_erlang_selector binding expression whose LIKE evaluator expanded percent and underscore wildcards into overlapping PCRE fragments. It executed those fragments with raw re:run/3 without match or recursion limits, allowing an authenticated tenant that can bind and publish to consume broker scheduler CPU and deny service with pathological selectors. This issue is fixed in versions 4.0.23, 4.1.14, 4.2.9, and 4.3.3.",
    "evidence": "osv:BIT-rabbitmq-2026-67413",
    "products": [
      {
        "name": {
          "value": "rabbitmq",
          "evidence": "/affected/0/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
          {
            "value": "4.0.23",
            "evidence": "/affected/0/ranges"
          },
          {
            "value": "4.1.14",
            "evidence": "/affected/0/ranges"
          },
          {
            "value": "4.2.9",
            "evidence": "/affected/0/ranges"
          },
          {
            "value": "4.3.3",
            "evidence": "/affected/0/ranges"
          }
        ],
        "affected_versions": []
      }
    ],
    "severity": "medium",
    "structured": {
      "id": "BIT-rabbitmq-2026-67413",
      "aliases": [
        "BIT-rabbitmq-2026-67413",
        "CVE-2026-67413",
        "GHSA-chxf-3hfg-j8f7"
      ],
      "affected": [
        {
          "ranges": [
            {
              "type": "SEMVER",
              "events": [
                {
                  "introduced": "4.0.0"
                },
                {
                  "fixed": "4.0.23"
                },
                {
                  "introduced": "4.1.0"
                },
                {
                  "fixed": "4.1.14"
                },
                {
                  "introduced": "4.2.0"
                },
                {
                  "fixed": "4.2.9"
                },
                {
                  "introduced": "4.3.0"
                },
                {
                  "fixed": "4.3.3"
                }
              ]
            }
          ],
          "package": {
            "name": "rabbitmq",
            "purl": "pkg:bitnami/rabbitmq",
            "ecosystem": "Bitnami"
          },
          "severity": [
            {
              "type": "CVSS_V4",
              "score": "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"
            }
          ],
          "database_specific": {
            "source": "https://github.com/bitnami/vulndb/tree/main/data/rabbitmq/BIT-rabbitmq-2026-67413.json"
          }
        }
      ],
      "modified": "2026-10-17T09:15:02.411852695Z",
      "provider": "osv",
      "references": [
        "https://github.com/rabbitmq/rabbitmq-server/commit/20203c50ea6ff459d462b2d4355326d3a870682c",
        "https://github.com/rabbitmq/rabbitmq-server/commit/60de2fbbcd812ab294985cef260cc2f1b1a02a5b",
        "https://github.com/rabbitmq/rabbitmq-server/commit/9e36b7f4c1e2eed77300288dca3e01bd9b23c432",
        "https://github.com/rabbitmq/rabbitmq-server/commit/f4d9da668b7304dfb9aeb2b4e9ff766a1275d021",
        "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/rabbitmq/rabbitmq-server/security/advisories/GHSA-chxf-3hfg-j8f7",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-67413"
      ],
      "provider_metadata": {
        "cpes": [
          "cpe:2.3:a:vmware:rabbitmq:*:*:*:*:*:*:*:*"
        ],
        "severity": "Medium"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2026-67413",
        "evidence": "/aliases"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/database_specific/severity"
  },
  "source_id": "core-osv",
  "document_id": 352240,
  "published_at": "2026-10-01T09:33:55.17+00:00"
}