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VulnerabilityPublished Updated

CVE-2026-67241: rabbitmq-server · Missing Authorization

Affects rabbitmq-serverSource CVE Database V5

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Not known to be exploited · CVSS 4.8 Medium : upgrade to 4.3.3 or 4.2.9 when convenient.

Data as of 8 Nov 2026, 23:24 UTC

CVSS 4.0 base score
4.8Medium
How severe the flaw is on the 0–10 CVSS scale.
EPSS
0.4% chance of exploitation in 30 days – higher than 36% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
Patch
Available – fixed in 4.3.3, 4.2.9
CVSS:4.0/AV:N/AC:L/AT:P/PR:H/UI:N/VC:N/VI:N/VA:N/SC:L/SI:H/SA:N

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 25 Sep 2026

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponized: no evidence on record.

    No public exploit code indexed in Metasploit or Exploit-DB

  4. Exploited in the wild: no evidence on record.

    Not in CISA KEV and no source reports exploitation

  5. Observed by OffSeq Mirage: no evidence on record.

    No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 8 Nov 2026.

What to do

Upgrade rabbitmq-server and rabbitmq/rabbitmq-server to 4.3.3 or 4.2.9.

Affected software

ProductAffectedFixed in
rabbitmqrabbitmq-serverAffected
  • >=4.3.0 <4.3.3
Fixed in
  • 4.3.3
rabbitmqrabbitmq-serverAffected
  • >=4.2.0 <4.2.9
Fixed in
  • 4.2.9
GitHubrabbitmq/rabbitmq-serverpkg:github/rabbitmq/rabbitmq-serverOther threatsAffected
  • >=4.2.0 <4.2.9
  • >=4.3.0 <4.3.3
Fixed in
  • 4.2.9
  • 4.3.3

Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.

AI-suggested

This vulnerability is fixed in RabbitMQ server versions 4.2.9 and 4.3.3. Users should upgrade to these or later versions to remediate the issue. No additional mitigation actions are indicated by the vendor advisory.

Description

RabbitMQ is a messaging and streaming broker. From 4.2.0 until 4.2.9 and 4.3.3, AMQP 1.0 management exchange.declare skips alternate-exchange permission check. pUT /exchanges/:name (lines 192-240) checks only configure on the declared exchange and passes XArgs straight to rabbitexchange:declare/7. It omits the checkreadpermitted(X) + checkwritepermitted(AE) that rabbitchannel.erl:2540-2548 enforces for the alternate-exchange argument on the AMQP 0-9-1 path. The same file already implements the analogous DLX check for queues (lines 708-719), confirming this is a missing-check bug rather than intentional A user with only configure on exchange X can route X's unroutable messages into an alternate exchange they have no write permission AMQP 1.0 enabled (default in RabbitMQ 4.x) Attacker has configure on at least one exchange but lacks write on the target. This issue is fixed in versions 4.2.9 and 4.3.3.

References

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