CVE-2026-67240

Что произошло

RabbitMQ is a messaging and streaming broker. Prior to versions 4.2.7 and 4.3.1, pattern_to_regex maps % -> .*? and _ -> ., then compiles ^...$ with only [unicode]; re:run is called with only [{capture, none}] - no explicit match_limit. A pattern like %_%_..._%X becomes ^.*?..*?.....*?.X$ with overlapping lazy quantifiers. The whole-expression cap is ?MAX_EXPRESSION_LENGTH=4096 chars / ?MAX_TOKENS=200; a LIKE string literal is one token, so ~2000 %_ pairs fit. SQL filters are accepted unconditionally at rabbit_amqp_session.erl:3264 (no feature flag). Evaluated per-message at rabbit_stream_queue.erl:1439. OTP's default 10M match_limit caps each match at ~100-200 ms (not seconds), and the re NIF yields to the scheduler. An authenticated AMQP 1.0 consumer with read+write on a stream queue can cause ~100-200 ms of CPU per delivered message via a crafted LIKE filter, multiplied across thousands of messages and parallel sessions - a substantial backtracking-driven CPU amplification. Preconditions include AMQP 1.0 with stream queues in use Attacker can attach a receiver with a filter (read permission) and publish messages with long property values (write permission). This issue is fixed in versions 4.2.7 and 4.3.1.

Что делать

dpkg-query -W -f='${Package}	${Version}\n'

rpm -qa --qf '%{NAME}\t%{VERSION}-%{RELEASE}\n'

Get-HotFix | Select-Object HotFixID, InstalledOn

Продукты и затронутые версии

{
  "status": "affected",
  "version": ">= 4.2.0, < 4.2.7"
}

{
  "status": "affected",
  "version": ">= 4.3.0, < 4.3.1"
}

{
  "status": "affected",
  "version": "*",
  "versionEndExcluding": "4.2.7",
  "versionStartIncluding": "4.2.0"
}

cpe:2.3:a:broadcom:rabbitmq_server:*:*:*:*:*:*:*:*

{
  "status": "affected",
  "version": "*",
  "versionEndExcluding": "4.3.1",
  "versionStartIncluding": "4.3.0"
}

cpe:2.3:a:broadcom:rabbitmq_server:*:*:*:*:*:*:*:*

CVSS: оценки и векторы

CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N

CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:N/VI:N/VA:L/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

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Источники и ссылки

{
  "cwes": [
    "cve",
    "nvd"
  ],
  "epss": {
    "source": "epss",
    "received_at": "2026-11-03T21:14:38.054953+00:00"
  },
  "title": {
    "source": "cve",
    "received_at": "2026-10-28T17:42:26.311637+00:00"
  },
  "scores": [
    "cve",
    "nvd"
  ],
  "status": {
    "source": "cve",
    "received_at": "2026-10-28T17:42:26.311637+00:00"
  },
  "affected": [
    "cve",
    "nvd"
  ],
  "published": {
    "source": "cve",
    "received_at": "2026-10-28T17:42:26.311637+00:00"
  },
  "solutions": [],
  "percentile": {
    "source": "epss",
    "received_at": "2026-11-03T21:14:38.054953+00:00"
  },
  "references": [
    "cve",
    "nvd"
  ],
  "description": {
    "source": "cve",
    "received_at": "2026-10-28T17:42:26.311637+00:00"
  },
  "workarounds": [],
  "configurations": [
    "nvd"
  ]
}

Хронология записи

1. Данные обновлены04.11.2026, 00:14
2. Данные обновлены03.11.2026, 00:13
3. Данные обновлены02.11.2026, 03:33
4. Данные обновлены02.11.2026, 00:12
5. Данные обновлены31.10.2026, 11:59
6. Данные обновлены29.10.2026, 12:36
7. Появилась ссылка на PoC28.10.2026, 20:42

Личная заметка и статус

Другие CVE того же продукта