CVE-2026-67419
published 2026-09-25CVE-2026-67419: 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…
PriorityP335medium6.5CVSS 3.1
AVNACLPRLUINSUCNINAH
EPSS
0.37%
30.1th percentile
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.
Affected
3 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| broadcom | rabbitmq_server | >= 4.3.0 < 4.3.5 | 4.3.5 |
| rabbitmq | rabbitmq-server | < 4.3.5 | 4.3.5 |
| rabbitmq | rabbitmq-server | — | — |
CVSS provenance
nvdv3.16.5MEDIUMCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
nvdv4.07.1HIGHCVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
vendor_redhat7.1HIGH
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Bugzilla
CVE-2026-67419 rabbitmq-server: rabbitmq-server: Denial of Service via consecutive wildcards in topic binding keys [fedora-all]
bugzilla·2026-10-08·CVSS 7.1
CVE-2026-67419 [HIGH] CVE-2026-67419 rabbitmq-server: rabbitmq-server: Denial of Service via consecutive wildcards in topic binding keys [fedora-all]
CVE-2026-67419 rabbitmq-server: rabbitmq-server: Denial of Service via consecutive wildcards in topic binding keys [fedora-all]
Disclaimer: Community trackers are created by Red Hat Product Security team on a best effort basis. Package maintainers are required to ascertain if the flaw indeed affects their package, before starting the update process.
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
Bugzilla
CVE-2026-67419 rabbitmq-server: rabbitmq-server: Denial of Service via consecutive wildcards in topic binding keys
bugzilla·2026-09-25·CVSS 7.1
CVE-2026-67419 [HIGH] CVE-2026-67419 rabbitmq-server: rabbitmq-server: Denial of Service via consecutive wildcards in topic binding keys
CVE-2026-67419 rabbitmq-server: rabbitmq-server: Denial of Service via consecutive wildcards in topic binding keys
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.
https://github.com/rabbitmq/rabbitmq-server/commit/c5ed7c4e97e02be688730803604cc7a88dbe4864https://github.com/rabbitmq/rabbitmq-server/releases/tag/v4.3.5https://github.com/rabbitmq/rabbitmq-server/security/advisories/GHSA-h964-v5mf-22cqhttps://github.com/rabbitmq/rabbitmq-server/security/advisories/GHSA-h964-v5mf-22cq
2026-09-25
Published