CVE-2026-77406

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Source
https://cve.org/CVERecord?id=CVE-2026-77406
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-77406.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2026-77406
Aliases
Downstream
Published
2026-09-16T14:37:36Z
Modified
2026-09-18T03:48:30Z
Severity
  • 8.2 (High) CVSS_V4 - 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 CVSS Calculator
Summary
RabbitMQ amqp091-go: Consumer Message Flooding via Signed-to-Unsigned Integer Casting in Qos Configuration
Details

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.

Database specific 
{
    "cna_assigner": "GitHub_M",
    "cwe_ids": [
        "CWE-195"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/77xxx/CVE-2026-77406.json"
}
References

Affected packages

Git / github.com/rabbitmq/amqp091-go

Affected ranges

Type
GIT
Repo
https://github.com/rabbitmq/amqp091-go
Events
Introduced
0 Unknown introduced commit / All previous commits are affected
Fixed
3b879e1d1d25b544e26b3bc3d7db3213203c0f3b
Fixed
d26d57e952cc61554ea9c54bd676c8f40ed0d84d
Database specific
Show details 
{
    "extracted_events": [
        {
            "introduced": "0"
        },
        {
            "fixed": "1.13.0"
        }
    ],
    "source": [
        "AFFECTED_FIELD",
        "REFERENCES"
    ]
}

Affected versions

v1.*
v1.1.0
v1.10.0
v1.11.0
v1.12.0
v1.2.0
v1.3.0
v1.3.1
v1.3.2
v1.3.3
v1.3.4
v1.4.0
v1.5.0
v1.6.0
v1.6.1
v1.6.1-rc.1
v1.6.1-rc.2
v1.7.0
v1.8.0
v1.8.1
v1.9.0

Database specific

source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-77406.json"