---
cve: "CVE-2026-67234"
severity: "LOW"
cvss: 2.3
epss: "6.1%"
vendor: "rabbitmq"
kev: false
exploited: false
published: "2026-09-25 17:17:11"
tags: [cve, security, low]
source: tsecurity.de CVE-Dossier
exported: "2026-09-26T08:26:44+02:00"
---

# CVE-2026-67234

> 2.3 LOW · 🧪 PoC

## Beschreibung

RabbitMQ is a messaging and streaming broker. From 4.2.0 until 4.2.8 and 4.3.2, get_auth_mechanism/1 used term_to_binary/1 on the strict_auth_mechanism or preferred_auth_mechanism atom when clearing the corresponding cookie, producing a non-ASCII cookie name that violates RFC 6265 and can prevent the browser from deleting the preference. The issue is not directly exploitable for code execution or data exfiltration; its security relevance is limited to stale authentication-mechanism preferences persisting across logout and login cycles. This issue is fixed in versions 4.2.8 and 4.3.2.

## CVSS-Vektor

```
CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N
```

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

## Patch verfügbar (OSV)

- 8b611c9f4bd2d1615ef855cdf1459da3196d4d3c (Commit)
- a509158b1b1e21c892a7f1dacbe0d158076dc7b8 (Commit)

## Referenzen

- <https://github.com/rabbitmq/rabbitmq-server/security/advisories/GHSA-q286-p3m9-j69f>
- <https://github.com/rabbitmq/rabbitmq-server/commit/149cb59d618cefa83c6deb02dbbb1e8a7a2bc968>
- <https://github.com/rabbitmq/rabbitmq-server/commit/baac0aaf170efeb4f124ee36b8417274fa8dcc1a>
- <https://github.com/rabbitmq/rabbitmq-server/releases/tag/v4.2.8>
- <https://github.com/rabbitmq/rabbitmq-server/releases/tag/v4.3.2>

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/cve?cve=CVE-2026-67234) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI BITS_