CVE-2026-67419

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Source
https://cve.org/CVERecord?id=CVE-2026-67419
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-67419.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2026-67419
Aliases
Downstream
Published
2026-09-25T16:41:08Z
Modified
2026-10-28T02:30:44Z
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: Consecutive topic wildcards cause combinatorial routing work
Details

RabbitMQ is a messaging and streaming broker. Prior to 4.3.5, an authenticated user who can bind a queue to a topic exchange and publish to it can use consecutive # segments in a binding key to make both topic matchers revisit the same trie-node and routing-key-suffix states without memoization. The matcher materializes duplicate destinations before deduplication, causing combinatorial CPU work and memory pressure that can disrupt routing for all tenants. This vulnerability is fixed in 4.3.5.

Database specific 
{
    "cna_assigner": "GitHub_M",
    "cwe_ids": [
        "CWE-1333",
        "CWE-407"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/67xxx/CVE-2026-67419.json"
}
References

Affected packages

Git / github.com/rabbitmq/rabbitmq-server

Affected ranges

Type
GIT
Repo
https://github.com/rabbitmq/rabbitmq-server
Events
Introduced
1929eeadf9b2bac12c5434fb56884ef27370580e
Fixed
0dde27bfdd1984ff7e157226fd97656854a7f359
Fixed
c5ed7c4e97e02be688730803604cc7a88dbe4864
Database specific
Show details 
{
    "extracted_events": [
        {
            "cpe": "cpe:2.3:a:broadcom:rabbitmq_server:*:*:*:*:*:*:*:*",
            "range": [
                {
                    "introduced": "4.3.0"
                },
                {
                    "fixed": "4.3.5"
                }
            ],
            "source": "CPE_RANGE"
        },
        {
            "range": [
                {
                    "fixed": "c5ed7c4e97e02be688730803604cc7a88dbe4864"
                }
            ],
            "source": "REFERENCES_COMMIT"
        },
        {
            "original_tag": "v4.3.5",
            "range": [
                {
                    "fixed": "0dde27bfdd1984ff7e157226fd97656854a7f359"
                }
            ],
            "source": "REFERENCES_TAG"
        }
    ]
}

Affected versions

v4.*
v4.3.0
v4.3.1
v4.3.2
v4.3.3
v4.3.4

Database specific

source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-67419.json"