CVE-2026-66080

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Source

https://cve.org/CVERecord?id=CVE-2026-66080

Import Source

https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2026-66080.json

JSON Data

https://api.test.osv.dev/v1/vulns/CVE-2026-66080

Aliases

GHSA-wg79-5449-m728

Downstream

Published

2026-09-23T20:20:34Z

Modified

2026-09-26T03:30:20Z

Severity

5.9 (Medium) CVSS_V4 - CVSS:4.0/AV:N/AC:L/AT:P/PR:H/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N CVSS Calculator

Summary

RabbitMQ: Super-stream partitions unbounded allocation

Details

RabbitMQ is a messaging and streaming broker. Prior to versions 4.1.11, 4.2.6, and 4.3.0, validate_partitions only checks that the requested partition count is at least 1, with no upper bound. A large count such as lists:seq(0, 500000000) allocates roughly 8GB. Preconditions include The rabbitmq_stream_management plugin must be enabled. The caller needs the management tag and access to the target vhost.. This issue is fixed in versions 4.1.11, 4.2.6, and 4.3.0.

Database specific

{
    "cna_assigner": "GitHub_M",
    "cwe_ids": [
        "CWE-770"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/66xxx/CVE-2026-66080.json",
    "unresolved_ranges": [
        {
            "extracted_events": [
                {
                    "introduced": "4.1.0"
                },
                {
                    "fixed": "4.1.11"
                }
            ],
            "source": "AFFECTED_FIELD"
        }
    ]
}

References

Affected packages

Git / github.com/rabbitmq/rabbitmq-server

Affected ranges

Type

GIT

Repo

https://github.com/rabbitmq/rabbitmq-server

Events

Introduced

95c501fbad76c66156346cf364d158d6e30aa4d9

Fixed

8a56c37f099a7bf609a555de3f0ff8ed23964d20

Fixed

1929eeadf9b2bac12c5434fb56884ef27370580e

Database specific

Show details

{
    "extracted_events": [
        {
            "introduced": "4.2.0"
        },
        {
            "fixed": "4.2.6"
        }
    ],
    "source": [
        "AFFECTED_FIELD",
        "REFERENCES"
    ]
}

Affected versions

v4.*

v4.2.0

v4.2.1

v4.2.2

v4.2.3

v4.2.4

v4.2.5

Database specific

source

"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2026-66080.json"