---
cve: "CVE-2026-67419"
severity: "HIGH"
cvss: 7.1
epss: "0.3%"
vendor: "rabbitmq"
kev: false
exploited: false
published: "2026-09-25 17:17:13"
tags: [cve, security, high]
source: tsecurity.de CVE-Dossier
exported: "2026-10-01T07:26:11+02:00"
---

# CVE-2026-67419

> 7.1 HIGH · 🧪 PoC

## Beschreibung

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.

## CVSS-Vektor

```
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
```

| Metrik | Wert | Bewertung |
|---|---|---|
| AV Angriffsvektor | Netzwerk | bad |
| AC Komplexität | Gering | bad |
| PR Privilegien | Gering | warn |
| UI Interaktion | Keine | bad |

## Patch verfügbar (OSV)

- c5ed7c4e97e02be688730803604cc7a88dbe4864 (Commit)
- 0dde27bfdd1984ff7e157226fd97656854a7f359 (Commit)

## BSI-Hinweise (deutsch)

- [RabbitMQ: Mehrere Schwachstellen](https://wid.cert-bund.de/portal/wid/sicherheitshinweis/WID-SEC-W-2026-2881) — _BSI-Einstufung: mittel_
  Ein Angreifer kann mehrere Schwachstellen in RabbitMQ ausnutzen, um Berechtigungen zu erweitern, Sicherheitsmaßnahmen zu umgehen, vertrauliche Informationen offenzulegen, Daten zu manipulieren, beliebigen Code auszuführen oder Denial-of-Service-Zustände herbeizuführen.

## Referenzen

- <https://github.com/rabbitmq/rabbitmq-server/security/advisories/GHSA-h964-v5mf-22cq>
- <https://github.com/rabbitmq/rabbitmq-server/commit/c5ed7c4e97e02be688730803604cc7a88dbe4864>
- <https://github.com/rabbitmq/rabbitmq-server/releases/tag/v4.3.5>

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/cve?cve=CVE-2026-67419) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI WID (CSAF)_