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Fencer Vulns
high 8.9

CVE-2026-77412 json

RabbitMQ amqp091-go: Denial of Service via Malicious Field Length in AMQP Client

published 2026-09-16 53 d ago modified 2026-10-01 38 d ago also GHSA-4v58-74mf-rjx3 , GO-2026-6494 , EUVD-2026-80819

cvss
8.9
version 4.0, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.5%
EPSS 0.5% chance of exploitation in 30 days, percentile 44%
public exploits
0
none known

Summary

RabbitMQ amqp091-go is a Go AMQP 0.9.1 client. Prior to 1.13.0, readField in read.go reads the length of an AMQP byte-array field with type tag x into a signed int32 and passes the value directly to make when allocating the field buffer. A malicious or compromised broker can encode a value such as 0xFFFFFFFF, which becomes -1 and causes a len out of range runtime panic. The panic escapes the network reader goroutine and terminates the client process, including during connection.start server properties or message header table parsing. This issue is fixed in version 1.13.0.

Patch / fix

  • go github.com/rabbitmq/amqp091-go 1.13.0
  • golang-github-rabbitmq-amqp091-go Debian 14 1.14.0-1

debian advisories DEBIAN-CVE-2026-77412

  • opentelemetry-collector-contrib hummingbird 1 0.161.0-0.1.hum1

red hat advisories RHSA-2026:68290

  • telegraf Azure Linux 3.0 1.31.0-34

azure linux advisories AZL-103293

Azure Linux vulnerability data, Copyright (c) Microsoft Corporation, from https://github.com/microsoft/AzureLinuxVulnerabilityData via OSV, under the MIT licence; changed: normalised to fixed package versions per release. MIT

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2026-77412 updated cvss 7.5

github.com/rabbitmq/amqp091-go: RabbitMQ amqp091-go: Denial of Service via Malicious AMQP Field Length

  • Red Hat Multicluster Global Hub multicluster-globalhub/multicluster-globalhub-grafana-rhel9 Red Hat Advanced Cluster Management for Kubernetes 2 rhacm2/acm-grafana-rhel9 Red Hat OpenStack Platform 18.0 rhoso-operators/rabbitmq-cluster-rhel9-operator Red Hat Quay 3 quay/clair-rhel8, quay/clair-rhel9
    affected: workaround, no fix available “Connect only to trusted AMQP brokers, protect broker credentials and transport security, and update applications using amqp091-go when a fixed version is available.”
  • Red Hat Hardened Images opentelemetry-collector-contrib 0.161.0-0.1.hum1
    fixed: vendor fix “Connect only to trusted AMQP brokers, protect broker credentials and transport security, and update applications using amqp091-go when a fixed version is available.” RHSA-2026:68290
  • Red Hat Quay 3.9 quay/quay-rhel8 1790808443
    fixed: vendor fix “Connect only to trusted AMQP brokers, protect broker credentials and transport security, and update applications using amqp091-go when a fixed version is available.” RHSA-2026:77656
  • Red Hat Quay 3.10 quay/quay-rhel8 1791462428
    fixed: vendor fix “Connect only to trusted AMQP brokers, protect broker credentials and transport security, and update applications using amqp091-go when a fixed version is available.” RHSA-2026:79366
  • Red Hat Quay 3.12 quay/quay-rhel8 1791314514
    fixed: vendor fix “Connect only to trusted AMQP brokers, protect broker credentials and transport security, and update applications using amqp091-go when a fixed version is available.” RHSA-2026:79546
  • Red Hat Cryostat 4 cryostat/cryostat-storage-rhel9
    not affected: component not present
  • Red Hat Custom Metric Autoscaler operator for Red Hat Openshift custom-metrics-autoscaler/custom-metrics-autoscaler-rhel9, custom-metrics-autoscaler/custom-metrics-autoscaler-adapter-rhel9, custom-metrics-autoscaler/custom-metrics-autoscaler-rhel9-operator, custom-metrics-autoscaler/custom-metrics-autoscaler-admission-webhooks-rhel9
    not affected: vulnerable code not present
  • Red Hat OpenShift Serverless openshift-serverless-1/kn-plugin-event-sender-rhel9
    not affected: vulnerable code not in execute path
show 1 more
  • Red Hat Advanced Cluster Management for Kubernetes 2 rhacm2/volsync-rhel9, rhacm2/volsync-operator-bundle Red Hat Quay 3.9 quay/clair-rhel8 1790697042, quay/quay-builder-rhel8 1790400755, quay/quay-operator-rhel8 1790399891, quay/quay-operator-bundle 1790903947, quay/quay-bridge-operator-rhel8 1790399899, quay/quay-bridge-operator-bundle 1790400430, +3 more Red Hat Quay 3.10 quay/clair-rhel8 1791318071, quay/quay-builder-rhel8 1791218455, quay/quay-operator-rhel8 1790399749, quay/quay-operator-bundle 1791465969, quay/quay-bridge-operator-rhel8 1790400341, quay/quay-bridge-operator-bundle 1790401388, +3 more Red Hat Quay 3.12 quay/clair-rhel8 1791318122, quay/quay-builder-rhel8 1791314224, quay/quay-operator-rhel8 1791435060, quay/quay-operator-bundle 1791436613, quay/quay-bridge-operator-rhel8 1791390151, quay/quay-bridge-operator-bundle 1791390652, +3 more
    not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

CISA SSVC

Exploitation
none
Automatable
yes
Technical impact
partial
Assessed
53 d ago

Exploit prediction

0.52% chance of exploitation in the next 30 days, higher than 44% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CNA 4.0 8.9 CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:H
CNA 4.0 8.9 CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:H/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

Affected packages

ecosystem package affected fixed in
go github.com/rabbitmq/amqp091-go
<1.13.0
1.13.0

Affected products

  • rabbitmq amqp091-go

Classification

Weakness
  • CWE-681 Incorrect Conversion between Numeric Types

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.