{"id":"CVE-2026-67235","aliases":["AZL-105798","BIT-rabbitmq-2026-67235","DEBIAN-CVE-2026-67235","EUVD-2026-85652","GHSA-q8g2-pc7m-m3jw","RHSA-2026:67552","UBUNTU-CVE-2026-67235","USN-8933-1"],"status":"published","title":"RabbitMQ: AMQP 0-9-1 body assembly never validates accumulated size","description":"RabbitMQ is a messaging and streaming broker. Prior to versions 4.3.0, 4.2.6, 4.1.11, 4.0.20, and 3.13.15, The content-header BodySize (a uint64) was stored without validation against max_message_size. The size check ran only when assembly completed. By declaring body_size = 2^63-1 and then streaming fragments, a client ensured that check_msg_size never fired, so the accumulated body size went unbounded. A reader process accumulates memory until the memory alarm fires, degrading all publishers cluster-wide, or until the node runs out of memory. The memory alarm provides only partial mitigation, since it is reactive rather than preventive. AMQP 0-9-1 is the most widely used protocol, and any publisher can trigger this condition. Preconditions include Any authenticated AMQP 0-9-1 client with publish permission can exploit this.. This issue is fixed in versions 4.3.0, 4.2.6, 4.1.11, 4.0.20, and 3.13.15.","severity":{"version":"4.0","score":7.1,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N","level":"high","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-10","score":0.00302,"percentile":0.23167,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-770"],"published":"2026-09-22T10:18:43Z","modified":"2026-11-05T05:40:51Z","fixes":[{"ecosystem":"Azure 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,"tags":["advisory"]},{"url":"https://github.com/rabbitmq/rabbitmq-server/commit/60a85d3605ebf94fd234497242812547d441d457","tags":["article"]},{"url":"https://github.com/rabbitmq/rabbitmq-server/commit/869f800998334bb363f2ad046f58de9caedc409e","tags":["article"]},{"url":"https://github.com/rabbitmq/rabbitmq-server/security/advisories/GHSA-f9f2-q3jf-wfj3","tags":["article"]},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2541531","tags":["report"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-67411","tags":["advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-67411","tags":["advisory"]},{"url":"https://github.com/rabbitmq/rabbitmq-server/commit/a7528314840c4f8dc9904684f9f97ffa7aac6349","tags":["article"]},{"url":"https://github.com/rabbitmq/rabbitmq-server/commit/edbead0eabbd65925d0dc914a22d6a29e155e646","tags":["article"]},{"url":"https://github.com/rabbitmq/rabbitmq-server/security/advisories/GHSA-4r6f-9cpw-f6g6","tags":["article"]},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2541507","tags":["report"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-67412","tags":["advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-67412","tags":["advisory"]},{"url":"https://github.com/rabbitmq/rabbitmq-server/security/advisories/GHSA-42pc-678q-v8qj","tags":["article"]},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2541526","tags":["report"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-67413","tags":["advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-67413","tags":["advisory"]},{"url":"https://github.com/rabbitmq/rabbitmq-server/commit/20203c50ea6ff459d462b2d4355326d3a870682c","tags":["article"]},{"url":"https://github.com/rabbitmq/rabbitmq-server/commit/60de2fbbcd812ab294985cef260cc2f1b1a02a5b","tags":["article"]},{"url":"https://github.com/rabbitmq/rabbitmq-server/commit/9e36b7f4c1e2eed77300288dca3e01bd9b23c432","tags":["article"]},{"url":"https://github.com/rabbitmq/rabbitmq-server/commit/f4d9da668b7304dfb9aeb2b4e9ff766a1275d021","tags":["article"]},{"url":"https://github.com/rabbitmq/rabbitmq-server/security/advisories/GHSA-chxf-3hfg-j8f7","tags":["article"]},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2541530","tags":["report"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-67415","tags":["advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-67415","tags":["advisory"]},{"url":"https://github.com/rabbitmq/rabbitmq-server/security/advisories/GHSA-8mpg-qw9r-m5cr","tags":["article"]},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2541534","tags":["report"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-67419","tags":["advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-67419","tags":["advisory"]},{"url":"https://github.com/rabbitmq/rabbitmq-server/commit/c5ed7c4e97e02be688730803604cc7a88dbe4864","tags":["article"]},{"url":"https://github.com/rabbitmq/rabbitmq-server/releases/tag/v4.3.5","tags":["article"]},{"url":"https://github.com/rabbitmq/rabbitmq-server/security/advisories/GHSA-h964-v5mf-22cq","tags":["article"]},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2541535","tags":["report"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-67420","tags":["advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-67420","tags":["advisory"]},{"url":"https://github.com/rabbitmq/rabbitmq-server/commit/5de287d213765ca592ff5848ad2f6b9b98ee6772","tags":["article"]},{"url":"https://github.com/rabbitmq/rabbitmq-server/security/advisories/GHSA-86fm-44m9-rqjx","tags":["article"]},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2541533","tags":["report"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-67421","tags":["advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-67421","tags":["advisory"]},{"url":"https://github.com/rabbitmq/rabbitmq-server/commit/ff595eaaa6d4f580f72fa04801ffd35f48c46027","tags":["article"]},{"url":"https://github.com/rabbitmq/rabbitmq-server/security/advisories/GHSA-6256-27fm-4rgr","tags":["article"]},{"url":"https://ubuntu.com/security/CVE-2026-67235","tags":["report"]},{"url":"https://ubuntu.com/security/notices/USN-8933-1","tags":["advisory"]},{"url":"https://ubuntu.com/security/CVE-2026-66070","tags":["report"]},{"url":"https://ubuntu.com/security/CVE-2026-66077","tags":["report"]},{"url":"https://ubuntu.com/security/CVE-2026-66079","tags":["report"]},{"url":"https://ubuntu.com/security/CVE-2026-67231","tags":["report"]},{"url":"https://ubuntu.com/security/CVE-2026-67232","tags":["report"]},{"url":"https://ubuntu.com/security/CVE-2026-67236","tags":["report"]},{"url":"https://ubuntu.com/security/CVE-2026-67237","tags":["report"]},{"url":"https://ubuntu.com/security/CVE-2026-67238","tags":["report"]},{"url":"https://ubuntu.com/security/CVE-2026-67239","tags":["report"]},{"url":"https://ubuntu.com/security/CVE-2026-67404","tags":["report"]},{"url":"https://ubuntu.com/security/CVE-2026-67409","tags":["report"]}],"sources":{"cve":[{"id":"CVE-2026-67235","title":"RabbitMQ: AMQP 0-9-1 body assembly never validates accumulated size","description":"RabbitMQ is a messaging and streaming broker. Prior to versions 4.3.0, 4.2.6, 4.1.11, 4.0.20, and 3.13.15, The content-header BodySize (a uint64) was stored without validation against max_message_size. The size check ran only when assembly completed. By declaring body_size = 2^63-1 and then streaming fragments, a client ensured that check_msg_size never fired, so the accumulated body size went unbounded. A reader process accumulates memory until the memory alarm fires, degrading all publishers cluster-wide, or until the node runs out of memory. The memory alarm provides only partial mitigation, since it is reactive rather than preventive. AMQP 0-9-1 is the most widely used protocol, and any publisher can trigger this condition. Preconditions include Any authenticated AMQP 0-9-1 client with publish permission can exploit this.. This issue is fixed in versions 4.3.0, 4.2.6, 4.1.11, 4.0.20, and 3.13.15.","status":"published","published":"2026-09-23T20:36:37.508Z","modified":"2026-09-24T15:04:51.023Z","cvss":[{"version":"4.0","score":7.1,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N","level":"high","assessor":"cna"}],"cwes":["CWE-770"],"updated_at":"2026-11-02T14:20:06.562031Z"}],"euvd":[{"id":"EUVD-2026-85652","description":"RabbitMQ is a messaging and streaming broker. Prior to versions 4.3.0, 4.2.6, 4.1.11, 4.0.20, and 3.13.15, The content-header BodySize (a uint64) was stored without validation against max_message_size. The size check ran only when assembly completed. By declaring body_size = 2^63-1 and then streaming fragments, a client ensured that check_msg_size never fired, so the accumulated body size went unbounded. A reader process accumulates memory until the memory alarm fires, degrading all publishers cluster-wide, or until the node runs out of memory. The memory alarm provides only partial mitigation, since it is reactive rather than preventive. AMQP 0-9-1 is the most widely used protocol, and any publisher can trigger this condition. Preconditions include Any authenticated AMQP 0-9-1 client with publish permission can exploit this.. This issue is fixed in versions 4.3.0, 4.2.6, 4.1.11, 4.0.20, and 3.13.15.","status":"published","published":"2026-09-23T20:36:37Z","modified":"2026-09-24T15:04:51Z","cvss":[{"version":"4.0","score":7.1,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N","level":"high"}],"updated_at":"2026-11-02T17:27:56.686358Z"}],"nvd":[{"id":"CVE-2026-67235","description":"RabbitMQ is a messaging and streaming broker. Prior to versions 4.3.0, 4.2.6, 4.1.11, 4.0.20, and 3.13.15, The content-header BodySize (a uint64) was stored without validation against max_message_size. The size check ran only when assembly completed. By declaring body_size = 2^63-1 and then streaming fragments, a client ensured that check_msg_size never fired, so the accumulated body size went unbounded. A reader process accumulates memory until the memory alarm fires, degrading all publishers cluster-wide, or until the node runs out of memory. The memory alarm provides only partial mitigation, since it is reactive rather than preventive. AMQP 0-9-1 is the most widely used protocol, and any publisher can trigger this condition. Preconditions include Any authenticated AMQP 0-9-1 client with publish permission can exploit this.. This issue is fixed in versions 4.3.0, 4.2.6, 4.1.11, 4.0.20, and 3.13.15.","status":"published","published":"2026-09-23T21:17:01.227Z","modified":"2026-10-19T20:39:07.837Z","cvss":[{"version":"4.0","score":7.1,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/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","level":"high","assessor":"secondary"},{"version":"3.1","score":6.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","level":"medium","assessor":"primary"}],"cwes":["CWE-770"],"updated_at":"2026-11-02T14:12:51.036099Z"}],"osv":[{"id":"CVE-2026-67235","title":"RabbitMQ: AMQP 0-9-1 body assembly never validates accumulated size","description":"RabbitMQ is a messaging and streaming broker. Prior to versions 4.3.0, 4.2.6, 4.1.11, 4.0.20, and 3.13.15, The content-header BodySize (a uint64) was stored without validation against max_message_size. The size check ran only when assembly completed. By declaring body_size = 2^63-1 and then streaming fragments, a client ensured that check_msg_size never fired, so the accumulated body size went unbounded. A reader process accumulates memory until the memory alarm fires, degrading all publishers cluster-wide, or until the node runs out of memory. The memory alarm provides only partial mitigation, since it is reactive rather than preventive. AMQP 0-9-1 is the most widely used protocol, and any publisher can trigger this condition. Preconditions include Any authenticated AMQP 0-9-1 client with publish permission can exploit this.. This issue is fixed in versions 4.3.0, 4.2.6, 4.1.11, 4.0.20, and 3.13.15.","status":"published","published":"2026-09-23T20:36:37.508Z","modified":"2026-10-28T02:31:06.532933222Z","cvss":[{"version":"4.0","score":7.1,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N","level":"high"}],"cwes":["CWE-770"],"updated_at":"2026-11-02T15:45:14.46177Z"},{"id":"DEBIAN-CVE-2026-67235","description":"RabbitMQ is a messaging and streaming broker. Prior to versions 4.3.0, 4.2.6, 4.1.11, 4.0.20, and 3.13.15, The content-header BodySize (a uint64) was stored without validation against max_message_size. The size check ran only when assembly completed. By declaring body_size = 2^63-1 and then streaming fragments, a client ensured that check_msg_size never fired, so the accumulated body size went unbounded. A reader process accumulates memory until the memory alarm fires, degrading all publishers cluster-wide, or until the node runs out of memory. The memory alarm provides only partial mitigation, since it is reactive rather than preventive. AMQP 0-9-1 is the most widely used protocol, and any publisher can trigger this condition. Preconditions include Any authenticated AMQP 0-9-1 client with publish permission can exploit this.. This issue is fixed in versions 4.3.0, 4.2.6, 4.1.11, 4.0.20, and 3.13.15.","status":"published","published":"2026-09-23T21:17:01.227Z","modified":"2026-10-23T18:05:41.494332585Z","cvss":[{"version":"3.1","score":6.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","level":"medium"}],"updated_at":"2026-11-02T15:46:01.68444Z"},{"id":"RHSA-2026:67552","title":"Red Hat Security Advisory: Red Hat Hardened Images RPMs bug fix and enhancement update","status":"published","published":"2026-09-22T10:18:43Z","modified":"2026-10-20T10:43:35.610185049Z","cvss":[{"version":"3.1","score":8.7,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:N","level":"high"}],"updated_at":"2026-11-02T15:53:22.406388Z"},{"id":"UBUNTU-CVE-2026-67235","description":"RabbitMQ is a messaging and streaming broker. Prior to versions 4.3.0, 4.2.6, 4.1.11, 4.0.20, and 3.13.15, The content-header BodySize (a uint64) was stored without validation against max_message_size. The size check ran only when assembly completed. By declaring body_size = 2^63-1 and then streaming fragments, a client ensured that check_msg_size never fired, so the accumulated body size went unbounded. A reader process accumulates memory until the memory alarm fires, degrading all publishers cluster-wide, or until the node runs out of memory. The memory alarm provides only partial mitigation, since it is reactive rather than preventive. AMQP 0-9-1 is the most widely used protocol, and any publisher can trigger this condition. Preconditions include Any authenticated AMQP 0-9-1 client with publish permission can exploit this.. This issue is fixed in versions 4.3.0, 4.2.6, 4.1.11, 4.0.20, and 3.13.15.","status":"published","published":"2026-09-23T21:17:00Z","modified":"2026-10-22T10:30:16.182456857Z","cvss":[{"version":"4.0","score":7.1,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N","level":"high"},{"version":"3.1","score":6.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","level":"medium"}],"updated_at":"2026-11-02T16:56:53.710209Z"},{"id":"AZL-105798","title":"CVE-2026-67235 affecting package rabbitmq-server for versions less than 3.13.7-10","description":"RabbitMQ is a messaging and streaming broker. Prior to versions 4.3.0, 4.2.6, 4.1.11, 4.0.20, and 3.13.15, The content-header BodySize (a uint64) was stored without validation against max_message_size. The size check ran only when assembly completed. By declaring body_size = 2^63-1 and then streaming fragments, a client ensured that check_msg_size never fired, so the accumulated body size went unbounded. A reader process accumulates memory until the memory alarm fires, degrading all publishers cluster-wide, or until the node runs out of memory. The memory alarm provides only partial mitigation, since it is reactive rather than preventive. AMQP 0-9-1 is the most widely used protocol, and any publisher can trigger this condition. Preconditions include Any authenticated AMQP 0-9-1 client with publish permission can exploit this.. This issue is fixed in versions 4.3.0, 4.2.6, 4.1.11, 4.0.20, and 3.13.15.","status":"published","published":"2026-09-23T21:17:01Z","modified":"2026-11-05T05:40:51Z","updated_at":"2026-11-05T16:41:17.719431Z"},{"id":"BIT-rabbitmq-2026-67235","title":"RabbitMQ: AMQP 0-9-1 body assembly never validates accumulated size","description":"RabbitMQ is a messaging and streaming broker. Prior to versions 4.3.0, 4.2.6, 4.1.11, 4.0.20, and 3.13.15, The content-header BodySize (a uint64) was stored without validation against max_message_size. The size check ran only when assembly completed. By declaring body_size = 2^63-1 and then streaming fragments, a client ensured that check_msg_size never fired, so the accumulated body size went unbounded. A reader process accumulates memory until the memory alarm fires, degrading all publishers cluster-wide, or until the node runs out of memory. The memory alarm provides only partial mitigation, since it is reactive rather than preventive. AMQP 0-9-1 is the most widely used protocol, and any publisher can trigger this condition. Preconditions include Any authenticated AMQP 0-9-1 client with publish permission can exploit this.. This issue is fixed in versions 4.3.0, 4.2.6, 4.1.11, 4.0.20, and 3.13.15.","status":"published","published":"2026-10-01T09:33:30.002Z","modified":"2026-10-20T10:30:29.197273334Z","updated_at":"2026-11-02T15:28:35.111822Z"},{"id":"USN-8933-1","title":"rabbitmq-server vulnerabilities","description":"It was discovered that RabbitMQ Server incorrectly handled CORS wildcard\norigin configuration. An attacker could possibly use this issue to cause\na cross-site request forgery attack. This issue only affected Ubuntu 18.04\nLTS, Ubuntu 20.04 LTS, Ubuntu 22.04 LTS, Ubuntu 24.04 LTS, and Ubuntu 26.04\nLTS. (CVE-2026-66070)\n\nIt was discovered that RabbitMQ Server incorrectly handled TLS\npeer-certificate DNs in the management UI. An attacker could possibly use\nthis issue to cause a cross-site scripting attack. (CVE-2026-66077)\n\nIt was discovered that RabbitMQ Server incorrectly handled AMQP 1.0 arrays\nwith zero-width element constructors. An attacker could possibly use this\nissue to cause a denial of service. This issue only affected Ubuntu 20.04\nLTS, Ubuntu 22.04 LTS, Ubuntu 24.04 LTS, and Ubuntu 26.04 LTS.\n(CVE-2026-66079)\n\nIt was discovered that RabbitMQ Server trust-store plugin incorrectly\nvalidated client certificates. An attacker could possibly use this issue to\nbypass TLS client authentication. This issue only affected Ubuntu 18.04 LTS,\nUbuntu 20.04 LTS, Ubuntu 22.04 LTS, Ubuntu 24.04 LTS, and Ubuntu 26.04 LTS.\n(CVE-2026-67231)\n\nIt was discovered that RabbitMQ Server incorrectly handled WebSocket frame\nsizes. An attacker could possibly use this issue to cause a denial of\nservice. This issue only affected Ubuntu 20.04 LTS, Ubuntu 22.04 LTS,\nUbuntu 24.04 LTS, and Ubuntu 26.04 LTS. (CVE-2026-67232)\n\nIt was discovered that RabbitMQ Server incorrectly handled content-header\nbody sizes. An attacker could possibly use this issue to cause a denial of\nservice. (CVE-2026-67235)\n\nIt was discovered that RabbitMQ Server incorrectly stored credentials in an\ninsecure cookie. An attacker could possibly use this issue to expose\nsensitive information. This issue only affected Ubuntu 20.04 LTS, Ubuntu\n22.04 LTS, Ubuntu 24.04 LTS, and Ubuntu 26.04 LTS. (CVE-2026-67236)\n\nIt was discovered that RabbitMQ Server incorrectly handled OAuth bearer\ntokens in bootstrap JavaScript. An attacker could possibly use this issue\nto cause a cross-site scripting attack. This issue only affected Ubuntu\n24.04 LTS and Ubuntu 26.04 LTS. (CVE-2026-67237)\n\nIt was discovered that RabbitMQ Server incorrectly handled ETF-encoded PID\nnode names. An attacker could possibly use this issue to cause a denial of\nservice. This issue only affected Ubuntu 22.04 LTS, Ubuntu 24.04 LTS, and\nUbuntu 26.04 LTS. (CVE-2026-67238)\n\nIt was discovered that RabbitMQ Server incorrectly handled TLS\npeer-certificate DNs in the stream management UI. An attacker could\npossibly use this issue to cause a cross-site scripting attack. This issue\nonly affected Ubuntu 22.04 LTS, Ubuntu 24.04 LTS, and Ubuntu 26.04 LTS.\n(CVE-2026-67239)\n\nIt was discovered that RabbitMQ Server incorrectly handled OAuth2 SSL\noptions when no CA certificates were available. An attacker could possibly\nuse this issue to bypass TLS verification. This issue only affected Ubuntu\n26.04 LTS. (CVE-2026-67404)\n\nIt was discovered that RabbitMQ Server incorrectly validated HTTP response\nstatus codes when fetching JWKS keys. An attacker could possibly use this\nissue to cause a denial of service. This issue only affected Ubuntu 22.04\nLTS, Ubuntu 24.04 LTS, and Ubuntu 26.04 LTS. (CVE-2026-67409)","status":"published","published":"2026-10-15T17:27:24Z","modified":"2026-11-03T21:19:26.174439472Z","updated_at":"2026-11-03T21:43:32.336286Z"}]}}