High [CVE-2026-79921] Denial of Service via oversized AMQP payloads
This high-severity Red Hat Linux advisory covers CVE-2026-79921 affecting Cryostat 4, Custom Metric Autoscaler operator for Red Hat Openshift, Multicluster Global Hub.
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Summary
amqp091-go is a Go AMQP 0.9.1 client. This can lead to unexpected memory consumption or application-layer denial of service (DoS), bypassing the protocol's built-in framing constraints.
Version 1.13.0 contains a fix. No known workarounds are available.
The impact is considered Important due to the potential for resource exhaustion and disruption of service. Red Hat severity: Important — CVSS 7.5 (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H).
Weakness: CWE-770. Affected Red Hat products: Cryostat 4; Custom Metric Autoscaler operator for Red Hat Openshift; Multicluster Global Hub; OpenShift Serverless; Red Hat Advanced Cluster Management for Kubernetes 2; Red Hat Hardened Images; Red Hat OpenStack Platform 18.0; Red Hat Quay 3.
Red Hat does not currently list a fixing RHSA for this CVE.
- < 1.13.0
Official advisory · high-confidence parse· fetched 2 hours ago·verify at source
Mitigation checklist
- Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base, or stability.
Official advisory · high-confidence parse· fetched 2 hours ago·verify at source
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