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CVE-2026-67410

Broadcom Rabbitmq Server information disclosure

7.1 HIGHPublic exploitEPSS 0.35%
  1. Published25 Sept 2026

Description

RabbitMQ is a messaging and streaming broker. From 4.2.0 until 4.3.3 and 4.2.9, OAuth2 Client Secret Exposed via Unauthenticated JavaScript Endpoint (CWE-200). when OAuth2 authentication is enabled for the RabbitMQ Management UI and the configured flow, IDP use a client secret, the oauthclientsecret configuration value is included in the JavaScript served by the unauthenticated endpoint /js/oidc-oauth/bootstrap.js. Any user who can reach the management UI port can retrieve the OAuth2 client secret without Files: deps/rabbitmqmanagement/src/rabbitmgmtwmauth.erl, line 186 deps/rabbitmqmanagement/src/rabbitmgmtoauthbootstrap.erl, lines 35-50 deps/rabbitmqmanagement/src/rabbitmgmtdispatcher.erl, lines 45-49 (route registration) Code Path: 1. The route /js/oidc-oauth/bootstrap.js is registered as a plain Cowboy handler (rabbitmgmtdispatcher.erl:46): Credential exposure for the affected configuration: OAuth2 client secret is accessible without any authentication Token theft: Attacker can complete the authorization code flow using stolen authorization codes Client impersonation: Attacker can make requests. Any RabbitMQ deployment with: This issue is fixed in versions 4.3.3 and 4.2.9.

CVSS 3.1 breakdown

Attack vectorNetwork
Attack complexityLow
Privileges requiredLow
User interactionNone
ScopeUnchanged
ConfidentialityHigh
IntegrityLow
AvailabilityNone
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:L/A:N

Affected products

Broadcom Rabbitmq Server≥ 4.2.0 < 4.2.9 · ≥ 4.3.0 < 4.3.3

Remediation

Fixed in
Broadcom Rabbitmq Server≥ 4.2.9

References

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Frequently asked

Is CVE-2026-67410 being actively exploited?

CVE-2026-67410 is not in the CISA KEV catalog. A public exploit reference exists, so treat it as exploitable. Its EPSS exploit probability is 0.35%.

How severe is CVE-2026-67410?

CVE-2026-67410 has a CVSS 3.1 base score of 7.1, rated high. EPSS estimates a 0.35% probability of exploitation.

Which products are affected by CVE-2026-67410?

Affected products include Broadcom Rabbitmq Server.

How do I fix CVE-2026-67410?

Upgrade affected software to a fixed version, for example Broadcom Rabbitmq Server 4.2.9 or later, then confirm no affected versions remain in your inventory.

How Secuno handles this

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Data from the NVD, CISA KEV catalog and FIRST EPSS. CVSS 3.1 base score shown where available.