CVE-2026-67225 rabbitmq CVE debrief

Who should care

RabbitMQ administrators and users, especially those using the stream plugin, should assess their exposure and take necessary actions to prevent or mitigate potential denial of service attacks.

Why it matters

This vulnerability in RabbitMQ can lead to denial of service attacks, impacting the availability of messaging and streaming services. Defenders should prioritize verifying exposure, assessing impact, and applying patches or updates to prevent or mitigate potential attacks.

• Denial of service through excessive memory pressure
• Potential disruption of messaging and streaming services
• Need for verification of RabbitMQ version and exposure
• Prioritization of patching or updating RabbitMQ deployments

Technical summary

The vulnerability occurs in the stream protocol of RabbitMQ, where the FrameMax value negotiated during the Tune handshake is not compared with an inbound frame's declared length before buffering the frame. This allows a remote client to cause excessive memory pressure and denial of service. The vulnerability can lead to denial of service attacks, impacting the availability of messaging and streaming services. Defenders should prioritize verifying exposure and assessing the impact of this vulnerability on their RabbitMQ deployments, especially those using the stream plugin.

Defensive priority

Defenders should prioritize verifying exposure and assessing the impact of this vulnerability on their RabbitMQ deployments, especially those using the stream plugin.

Recommended defensive actions

• Verify RabbitMQ version and assess exposure
• Review and apply patches or updates
• Monitor for suspicious activity
• Consider compensating controls
• Review 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 vulnerability, including affected versions and fixed versions. However, additional information on exploitation or victim impact is not available. The vulnerability occurs in the stream protocol of RabbitMQ, where the FrameMax value negotiated during the Tune handshake is not compared with an inbound frame's declared length before buffering the frame. This allows a remote client to cause excessive memory pressure and denial of service. RabbitMQ administrators and users, especially 3.

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.