Advisory severityHigh7.5Vendor: MediumRed Hat Linux

High [CVE-2026-77403] RabbitMQ amqp091-go: Denial of Service via AMQP frame size negotiation

This high-severity Red Hat Linux advisory covers CVE-2026-77403; related products: Red Hat Hardened Images, Cryostat 4, Custom Metric Autoscaler operator for Red Hat Openshift.

Aggregated and source-linked by VulniPulse. Data sources, validation and limitations.

CVE-2026-77403 Source published Sep 16, 2026Source updated Sep 16, 2026

VulniPulse record published Sep 18, 2026Record updated Sep 25, 2026

CVE-2026-77403

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Summary

RabbitMQ amqp091-go: Denial of Service via AMQP frame size negotiation. Red Hat rates this moderate (CVSS 7.5).

Weakness: CWE-839. Red Hat lists fixing advisory RHSA-2026:68290 with package opentelemetry-collector-contrib-main-0.161.0-0.1.hum1.

Affected products named by the advisory: Red Hat Hardened Images; Cryostat 4; Custom Metric Autoscaler operator for Red Hat Openshift; Multicluster Global Hub; and 4 more.

Affected products named by the advisory: OpenShift Serverless; Red Hat Advanced Cluster Management for Kubernetes 2; Red Hat OpenStack Platform 18.0; Red Hat Quay 3.

Affected versions

< 1.13.0

Official advisory · high-confidence parse· fetched 12 days ago·verify at source

Fixed versions

opentelemetry-collector-contrib-main-0.161.0-0.1.hum1
RHSA-2026:68290

Official advisory · high-confidence parse· fetched 12 days ago·verify at source

Mitigation checklist

Recommended fix / mitigation

To mitigate this issue, ensure that applications using the RabbitMQ amqp091-go client only connect to trusted AMQP brokers. Restrict network access for clients to only communicate with known, secure broker instances. This reduces the risk of a malicious or compromised broker exploiting the client's vulnerability during frame size negotiation.

Official advisory · high-confidence parse· fetched 12 days ago·verify at source

Discussion(0)

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