CVE-2026-67235

See a problem?
Please try reporting it to the source first.

Source

https://cve.org/CVERecord?id=CVE-2026-67235

Import Source

https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2026-67235.json

JSON Data

https://api.test.osv.dev/v1/vulns/CVE-2026-67235

Aliases

GHSA-q8g2-pc7m-m3jw

Downstream

Published

2026-09-23T20:36:37Z

Modified

2026-09-26T03:31:07Z

Severity

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

Summary

RabbitMQ: AMQP 0-9-1 body assembly never validates accumulated size

Details

RabbitMQ is a messaging and streaming broker. Prior to versions 4.3.0, 4.2.6, 4.1.11, 4.0.20, and 3.13.15, The content-header BodySize (a uint64) was stored without validation against max_message_size. The size check ran only when assembly completed. By declaring body_size = 2^63-1 and then streaming fragments, a client ensured that check_msg_size never fired, so the accumulated body size went unbounded. A reader process accumulates memory until the memory alarm fires, degrading all publishers cluster-wide, or until the node runs out of memory. The memory alarm provides only partial mitigation, since it is reactive rather than preventive. AMQP 0-9-1 is the most widely used protocol, and any publisher can trigger this condition. Preconditions include Any authenticated AMQP 0-9-1 client with publish permission can exploit this.. This issue is fixed in versions 4.3.0, 4.2.6, 4.1.11, 4.0.20, and 3.13.15.

Database specific

{
    "cna_assigner": "GitHub_M",
    "cwe_ids": [
        "CWE-770"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/67xxx/CVE-2026-67235.json",
    "unresolved_ranges": [
        {
            "extracted_events": [
                {
                    "introduced": "4.1.0"
                },
                {
                    "fixed": "4.1.11"
                },
                {
                    "introduced": "4.0.0"
                },
                {
                    "fixed": "4.0.20"
                },
                {
                    "introduced": "3.13.0"
                },
                {
                    "fixed": "3.13.15"
                }
            ],
            "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-2026-67235.json"