> CVE-2026-77406 [HIGH]

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PUBLISHED
2026-09-16 15:17
MODIFIED
2026-09-16 15:17
CVSS_SCORE V3
8.2
EPSS (Prob. Exploit)
0.41%
Top 66.1%
DATA SOURCES:
NVD 🔗 2026-09-16 RED HAT 🔗 2026-09-20 CWE MITRE 🔗 2026-10-01 FIRST EPSS 🔗 2026-10-18 GITHUB 🔗 2026-09-23 OSV 🔗 2026-10-19 MSRC 🔗 2026-09-20

> DESCRIPTION

RabbitMQ amqp091-go is a Go AMQP 0.9.1 client. Prior to 1.13.0, Channel.Qos in channel.go accepts negative prefetchCount and prefetchSize integers and casts them directly to uint16 and uint32 fields in the basic.qos method because validateQos is absent. Values such as -1 therefore wrap to 65535 or 4294967295 instead of being rejected. An application that permits untrusted configuration of these Qos values can unintentionally request extremely large prefetch limits, allowing a broker to deliver enough queued messages to exhaust client memory and disrupt processing. This issue is fixed in version 1.13.0.

> AFFECTED_PRODUCTS

ℹ️ Aucun produit affecté n'a encore été publié par NVD pour cette CVE.

> CVSS V3 METRICS

CVSS_VECTOR
CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:L/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

> MÉTRIQUES CVSS DÉTAILLÉES

CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:L/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
Métrique Valeur Interprétation
AV (Vecteur d'Attaque)
Attack Vector
Network (N)
Exploit possible à distance via réseau (HTTP, API, etc.)
AC (Complexité d'Attaque)
Attack Complexity
Low (L)
Peu de conditions requises pour exploiter
PR (Privilèges Requis)
Privileges Required
None (N)
Aucune authentification requise
UI (Interaction Utilisateur)
User Interaction
None (N)
Aucune interaction utilisateur nécessaire
S (Périmètre)
Scope
Unchanged (U)
Impact reste dans le périmètre du composant compromis
C (Impact Confidentialité)
Confidentiality Impact
None (N)
Aucune divulgation d'informations
I (Impact Intégrité)
Integrity Impact
None (N)
Aucune modification de données possible
A (Impact Disponibilité)
Availability Impact
High (H)
Interruption totale du service possible

> RÉSUMÉ DES IMPACTS

Confidentialité
None
Aucune divulgation d'informations
Intégrité
None
Aucune modification de données possible
Disponibilité
High
Interruption totale du service possible

> WEAKNESSES

CWE-195

> CWE DETAILED DESCRIPTIONS

CWE-195: Signed to Unsigned Conversion Error - The product uses a signed primitive and performs a cast to an unsigned primitive, which can produce an unexpected value if the value of the signed primitive can not be represented using an unsigned primitive.

> RED HAT SECURITY ADVISORIES

Red Hat Security Advisory: Red Hat Quay 3.9.27
Red Hat Quay 3.9.27 is now available with bug fixes.
Red Hat Security Advisory: Red Hat Quay 3.12.23
Red Hat Quay 3.12.23 is now available with bug fixes.
Red Hat Security Advisory: Red Hat Quay 3.10.27
Red Hat Quay 3.10.27 is now available with bug fixes.

> RED HAT SEVERITY ASSESSMENT

THREAT SEVERITY
Important

> GITHUB SECURITY ADVISORY

GHSA-rm6m-hrcw-jw33 HIGH

RabbitMQ amqp091-go: Consumer Message Flooding via Signed-to-Unsigned Integer Casting in Qos Configuration

AFFECTED PACKAGES:
GO / github.com/rabbitmq/amqp091-go
< 1.13.0
Fixed in: 1.13.0

> OSV (GOOGLE OPEN SOURCE VULNERABILITIES)

RabbitMQ amqp091-go: Consumer Message Flooding via Signed-to-Unsigned Integer Casting in Qos Configuration

AFFECTED PACKAGES:
Unknown / Unknown
20 versions affected
ALIASES:
GHSA-rm6m-hrcw-jw33, GO-2026-6502

> HISTORIQUE DES MODIFICATIONS

Première apparition
16/09/2026 15:17
Source: NVD
📊 ENRICHISSEMENT 01/10/2026 06:01
CWE
Champ modifié: Description CWE
Ancienne valeur:
N/A
Nouvelle valeur:
CWE-195: Signed to Unsigned Conversion Error - The product uses a signed primitive and performs a cast to an unsigned primitive, which can produce an unexpected value if the value of the signed primit...
📊 ENRICHISSEMENT 20/09/2026 05:01
REDHAT
Champ modifié: Sévérité Red Hat
Ancienne valeur:
N/A
Nouvelle valeur:
{ "threat_severity": "Important", "severity_scale": null }
📊 ENRICHISSEMENT 20/09/2026 05:01
REDHAT
Champ modifié: Red Hat
Ancienne valeur:
Non
Nouvelle valeur:
Oui
Total des modifications: 3 Dernière mise à jour: 3 weeks ago

> REFERENCES

https://github.com/rabbitmq/amqp091-go/commit/3b879e1d1d25b544e26b3bc3d7db321320...
https://github.com/rabbitmq/amqp091-go/pull/351
https://github.com/rabbitmq/amqp091-go/releases/tag/v1.13.0
https://github.com/rabbitmq/amqp091-go/security/advisories/GHSA-rm6m-hrcw-jw33
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