{"id":"CVE-2026-66072","title":"RabbitMQ is a messaging and streaming broker","summary":"RabbitMQ is a messaging and streaming broker. Prior to versions 3.13.15, 4.0.20, 4.1.11, 4.2.6, and 4.3.1, get_chunk_selector/1 calls binary_to_atom on the raw client-supplied <<\"chunk_selector\">> property from post-auth subscribe and re…","severity":"medium","cvss":6,"cvssVector":"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","CWE-770"],"vendor":"rabbitmq","product":"rabbitmq-server","affected":["rabbitmq-server >= 3.13.0, < 3.13.15","rabbitmq-server >= 4.0.0, < 4.0.20","rabbitmq-server >= 4.1.0, < 4.1.11","rabbitmq-server >= 4.2.0, < 4.2.6","rabbitmq-server >= 4.3.0, < 4.3.1"],"patched":["hardened_images"],"published":"2026-09-23","updated":"2026-09-24","sourceUpdated":"2026-09-24T15:17:28.377","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-66072","references":[{"url":"https://github.com/rabbitmq/rabbitmq-server/releases/tag/v4.2.6","label":"security-advisories@github.com"},{"url":"https://github.com/rabbitmq/rabbitmq-server/releases/tag/v4.3.1","label":"security-advisories@github.com"},{"url":"https://github.com/rabbitmq/rabbitmq-server/security/advisories/GHSA-48hm-chgv-398r","label":"security-advisories@github.com"},{"url":"https://github.com/rabbitmq/rabbitmq-server/security/advisories/GHSA-48hm-chgv-398r","label":"134c704f-9b21-4f2e-91b3-4a467353bcc0"},{"url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-66072.json"},{"url":"https://access.redhat.com/security/cve/CVE-2026-66072"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2539758"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-66072"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-66072"},{"url":"https://access.redhat.com/errata/RHSA-2026:67552"}],"tags":["nvd","cve.org","exploit-available","csaf","vex","red-hat"],"exploitAvailable":true,"ssvc":{"exploitation":"poc","automatable":"no","technicalImpact":"partial","timestamp":"2026-09-24T14:27:03.236517Z"},"cvssSource":"cna","scores":{"cna":6,"vendor":6.5},"ingestedAt":"2026-09-23T20:32:10.760Z","epss":0.00473,"epssPercentile":0.4074,"slug":"CVE-2026-66072","body":"## Overview\n\nRabbitMQ is a messaging and streaming broker. Prior to versions 3.13.15, 4.0.20, 4.1.11, 4.2.6, and 4.3.1, get_chunk_selector/1 calls binary_to_atom on the raw client-supplied <<\"chunk_selector\">> property from post-auth subscribe and resolve_offset_spec frames, with no whitelist and no existing guard. An authenticated stream client with read access to any stream can crash the broker node. Preconditions include rabbitmq_stream plugin enabled Authenticated stream-protocol user with read access to at least one stream. This issue is fixed in versions 3.13.15, 4.0.20, 4.1.11, 4.2.6, and 4.3.1.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.\n\n## Vendor advisories\n\n- **RHSA-2026:67552** · Red Hat · fixed in: Red Hat Hardened Images · released 2026-09-15 · [advisory](https://access.redhat.com/errata/RHSA-2026:67552)\n- **Red Hat VEX** · Moderate · affected: Red Hat Hardened Images, Red Hat OpenStack Platform 13 (Queens), Red Hat OpenStack Platform 16.2, Red Hat OpenStack Platform 17.1, Red Hat OpenStack Platform 18.0 · no fix planned: Red Hat OpenStack Platform 13 (Queens), Red Hat OpenStack Platform 16.2, Red Hat OpenStack Platform 17.1, Red Hat Hardened Images, … · updated 2026-09-24 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-66072.json)","depth":"twilight","depthScore":45,"depthScoreParts":{"impact":33,"likelihood":0.1,"exploitation":12,"ransomware":0},"changes":[{"seq":210201,"id":"CVE-2026-66072","ts":1790264800421,"field":"exploit_available","old":"false","new":"true"}]}