CVE-2026-67421 rabbitmq CVE debrief

Who should care

RabbitMQ administrators and users with Management UI and OAuth enabled should assess exposure and apply patches. They should also review OAuth management UI configuration, restrict queue configure permissions, and monitor for suspicious actions. Additionally, defenders should verify the exposure of RabbitMQ Management UI and prioritize patch application.

Why it matters

CVE-2026-67421 RabbitMQ Management UI vulnerability allows for authorization header redirect, requiring defenders to verify exposure, apply patches, and restrict permissions.

• Potential authorization header exposure to attacker-controlled endpoints.
• Possible redirect of victim's Authorization header to an attacker endpoint.
• Required verification of RabbitMQ Management UI exposure and patch application.
• Necessity to restrict queue configure permissions and monitor for suspicious actions.

Technical summary

The RabbitMQ Management UI is vulnerable to an authorization header redirect when the OAuth management UI is enabled. An attacker with queue configure permission and a management administrator who can see but not read the queue can exploit this issue. The vulnerability is fixed in RabbitMQ versions 3.13.19, 4.0.24, 4.1.15, 4.2.10, and 4.3.5. Defenders should prioritize verifying exposure and applying patches for RabbitMQ Management UI users with OAuth enabled. This involves reviewing OAuth management UI configuration, restricting queue configure permissions, and monitoring for suspicious actions.

Defensive priority

Defenders should prioritize verifying exposure and applying patches for RabbitMQ Management UI users with OAuth enabled.

Recommended defensive actions

• Verify RabbitMQ Management UI exposure and apply patches to versions 3.13.19, 4.0.24, 4.1.15, 4.2.10, and 4.3.5.
• Review OAuth management UI configuration and restrict queue configure permissions.
• Monitor for suspicious Get Message(s) actions and Authorization header anomalies.
• Review compensating controls for exposed systems while remediation is scheduled and verified.
• Check relevant monitoring, detection, and logs for exposed assets that need extra review.
• Track exceptions, retest remediated assets, and close the item only after evidence is documented.
• Confirm whether affected product deployments exist in managed environments and assign an owner for follow-up.

Evidence notes

The CVE record and NVD entry provide details on the RabbitMQ Management UI vulnerability. However, limited information is available on actual exploitation or victim impact. Defenders should verify the exposure of RabbitMQ Management UI, review OAuth management UI configuration, and monitor for suspicious actions. The vulnerability is fixed in RabbitMQ versions 3.13.19, 4.0.24, 4.1.15, 4.2.10, and 4.3.5.

Sources and references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.