CVE-2026-67414

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Source
https://cve.org/CVERecord?id=CVE-2026-67414
Import Source
https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2026-67414.json
JSON Data
https://api.test.osv.dev/v1/vulns/CVE-2026-67414
Aliases
Downstream
Published
2026-10-14T16:04:07Z
Modified
2026-10-22T10:36:11Z
Severity
  • 6.0 (Medium) CVSS_V4 - CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N CVSS Calculator
Summary
RabbitMQ AMQP 1.0 parser: amplification memory-exhaustion DoS via zero-width array aggregation
Details

RabbitMQ is a messaging and streaming broker. From 4.0.0 until 4.0.24, 4.1.15, 4.2.10, and 4.3.4, deps/amqp10_common/src/amqp10_binary_parser.erl materializes each element of AMQP 1.0 arrays whose shared constructor has zero width, while limiting only the number of elements in each array and not the aggregate arrays in a frame. After completing SASL authentication, a low-privilege client can send an ordinary frame containing many individually permitted arrays, causing a small frame to expand into a very large reader-process heap before later frame validation or authorization. Because deps/rabbit/src/rabbit_amqp_reader.erl clears the pre-authentication max_heap_size guard after login, repeated or concurrent frames can trigger the node-wide memory alarm, block publishers, or exhaust broker memory. This issue is fixed in versions 4.0.24, 4.1.15, 4.2.10, and 4.3.4.

Database specific 
{
    "cna_assigner": "GitHub_M",
    "cwe_ids": [
        "CWE-400",
        "CWE-770"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/67xxx/CVE-2026-67414.json",
    "unresolved_ranges": [
        {
            "extracted_events": [
                {
                    "range": [
                        {
                            "introduced": "4.0.0"
                        },
                        {
                            "fixed": "4.0.24"
                        },
                        {
                            "introduced": "4.1.0"
                        },
                        {
                            "fixed": "4.1.15"
                        },
                        {
                            "introduced": "4.2.0"
                        },
                        {
                            "fixed": "4.2.10"
                        }
                    ],
                    "source": "AFFECTED_FIELD",
                    "strategy": "StringRangeExpression"
                }
            ]
        }
    ]
}
References

Affected packages

Git / github.com/rabbitmq/rabbitmq-server

Affected ranges

Type
GIT
Repo
https://github.com/rabbitmq/rabbitmq-server
Events
Introduced
1929eeadf9b2bac12c5434fb56884ef27370580e
Fixed
d5186e66e056960f58e2d0fbee2fcc66e1ed6fb9
Fixed
3f0f67dfb7c4390e3cbfa25ab3ee19dcb0845bd4
Database specific
Show details 
{
    "extracted_events": [
        {
            "range": [
                {
                    "introduced": "4.3.0"
                },
                {
                    "fixed": "4.3.4"
                }
            ],
            "source": "AFFECTED_FIELD",
            "strategy": "StringRangeExpression"
        },
        {
            "range": [
                {
                    "fixed": "3f0f67dfb7c4390e3cbfa25ab3ee19dcb0845bd4"
                }
            ],
            "source": "REFERENCES_COMMIT"
        },
        {
            "original_tag": "v4.3.4",
            "range": [
                {
                    "fixed": "d5186e66e056960f58e2d0fbee2fcc66e1ed6fb9"
                }
            ],
            "source": "REFERENCES_TAG"
        }
    ]
}

Affected versions

v4.*
v4.3.0
v4.3.1
v4.3.2
v4.3.3

Database specific

source 
"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2026-67414.json"