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TI-2026-53999 Aliases CVE-2026-77409

RabbitMQ amqp091-go: Denial of Service via Synchronous Event Channel Blocking

Priority MEDIUM 42CWE-770Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Attack requirements
Present
Impact type
Denial of service
Confidentiality · integrity · availability
None · None · High
Fix status
Partial Red Hat: 4 fixed, 4 without a fix

Attack profile from CVSS 4.0 · CNA. Fix status from CNA and Red Hat. Impact type from CWE-770.

Summary

RabbitMQ amqp091-go is a Go AMQP 0.9.1 client. Prior to 1.13.0, Channel.dispatch in channel.go, confirms.confirm in confirms.go, and Connection.dispatch0 in connection.go synchronously send publisher confirmations, flow-control events, consumer cancellations, returned messages, including NotifyConfirm events and connection block notifications, to application-provided channels. If a listener channel is unbuffered, full, or not drained promptly, the sole reader goroutine blocks and stops processing frames, acknowledgments, deliveries, and heartbeats. Broker-driven event bursts can therefore cause connection stalls, missed heartbeats, deadlocks, and disconnection. This issue is fixed in version 1.13.0.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00524 44th percentileScored 2026-11-07
Fix Partial amqp091-go (rabbitmq): 1.13.0Red Hat: 4 advisoriesRed Hat: 4 fixed, 4 without a fix

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
Yes
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
rabbitmqamqp091-gobefore 1.13.01.13.0Patch availableCNA
  • amqp091-go Vendorrabbitmq Affected before 1.13.0 Fixed in 1.13.0 Patch available CNA

Remediation

  • Fix · CNA amqp091-go (rabbitmq) Fixed in 1.13.0

Red Hat 4 advisories

  • RHSA-2026:79546 Released 2026-10-08 · Red Hat rating Important
    Red Hat Quay 3.12.23
    • Red Hat Quay 3.12 registry.redhat.io/quay/quay-rhel8
  • RHSA-2026:79366 Released 2026-10-08 · Red Hat rating Important
    Red Hat Quay 3.10.27
    • Red Hat Quay 3.10 registry.redhat.io/quay/quay-rhel8
  • RHSA-2026:77656 Released 2026-10-07 · Red Hat rating Important
    Red Hat Quay 3.9.27
    • Red Hat Quay 3.9 registry.redhat.io/quay/quay-rhel8
Show 1 more Red Hat advisories
  • RHSA-2026:68290 Released 2026-09-16 · Red Hat rating Important
    Red Hat Hardened Images RPMs bug fix and enhancement update
    • Red Hat Hardened Images opentelemetry-collector-contrib-0.161.0-0.1.hum1@aarch64, opentelemetry-collector-contrib-0.161.0-0.1.hum1@src, opentelemetry-collector-contrib-0.161.0-0.1.hum1@x86_64

Vendor assessments

Red Hat

Red Hat rating: Important. Red Hat's page for this CVE →

ProductStatusPlan or fix
Multicluster Global HubAffectedNo fix yet
Red Hat Advanced Cluster Management for Kubernetes 2AffectedNo fix yet
Red Hat OpenStack Platform 18.0AffectedNo fix yet
Red Hat Quay 3AffectedNo fix yet
Red Hat Hardened ImagesFixed RHSA-2026:68290
Red Hat Quay 3.10Fixed RHSA-2026:79366
Red Hat Quay 3.12Fixed RHSA-2026:79546
Red Hat Quay 3.9Fixed RHSA-2026:77656
Not affected: 7 products
  • Cryostat 4
  • Custom Metric Autoscaler operator for Red Hat Openshift
  • OpenShift Serverless
  • Red Hat Advanced Cluster Management for Kubernetes 2
  • Red Hat Quay 3.10
  • Red Hat Quay 3.12
  • Red Hat Quay 3.9

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-77409
  2. 2026-10-07 Fix available: RHSA-2026:77656 · Red Hat
  3. 2026-10-08 Fix available: Red Hat Quay 3.9 · Red Hat
  4. 2026-10-09 Fix available: RHSA-2026:79546 · Red Hat
  5. 2026-10-09 Fix available: RHSA-2026:79366 · Red Hat
  6. 2026-10-09 Fix available: Red Hat Quay 3.10, Red Hat Quay 3.12 · Red Hat
  7. 2026-10-24 Affected versions changed · Red Hat

References

Other 4

  • TI-2026-41154 Improper authentication in rabbitmq-server CVSS 3.1CRITICAL 10.0
  • TI-2026-41149 RabbitMQ: UNC SSRF affecting the management UI on Windows CVSS 3.1CRITICAL 10.0
  • TI-2026-41158 Resource allocation without limits in rabbitmq-server CVSS 3.1HIGH 7.5
  • TI-2026-47695 RabbitMQ: OAuth2 Client Secret Exposed via Unauthenticated JavaScript Endpoint CVSS 4.0HIGH 8.2
  • TI-2026-47694 RabbitMQ: JWKS Fetch Ignores HTTP Response Status Code - Signing Key Destruction Causes Authentication DoS CVSS 4.0HIGH 8.2
  • TI-2026-45167 RabbitMQ Java client: Unvalidated Class.forName in JSON-RPC ProcedureDescription enables arbitrary class loading CVSS 4.0HIGH 7.5
See all 100 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences