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VulnerabilityPublished

CVE-2026-67410: rabbitmq-server · Information Exposure

Affects rabbitmq-serverSource CVE Database V5

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Not known to be exploited · CVSS 8.2 High : upgrade to 4.3.3 or 4.2.9 soon.

Data as of 8 Nov 2026, 23:24 UTC

CVSS 4.0 base score
8.2High
How severe the flaw is on the 0–10 CVSS scale.
EPSS
0.4% chance of exploitation in 30 days – higher than 35% 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:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/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 9 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
  • >=4.3.0 <4.3.3
  • >=4.2.0 <4.2.9
Fixed in
  • 4.3.3
  • 4.2.9

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

AI-suggested

Upgrade RabbitMQ server to version 4.2.9 or later if using the 4.2.x branch, or to version 4.3.3 or later if using the 4.3.x branch. These versions contain the official fix that prevents exposure of the OAuth2 client secret via the unauthenticated JavaScript endpoint. No other mitigation is required once the upgrade is applied.

Description

CVE-2026-67410 is a vulnerability in RabbitMQ server versions 4.2.0 through 4.2.8 and 4.3.0 through 4.3.2 where the OAuth2 client secret is exposed via an unauthenticated JavaScript endpoint. This occurs when OAuth2 authentication is enabled for the RabbitMQ Management UI and the configured flow uses a client secret. The secret is included in the JavaScript served by the unauthenticated endpoint /js/oidc-oauth/bootstrap.js, allowing any user who can access the management UI port to retrieve it. The issue is fixed in versions 4.2.9 and 4.3.3.

References

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