CVE catalog
CVE-2026-67234
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 t
- Severity
- Low · CVSS 3.1
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:L/A:N - Published
- Updated
- Source
- [NVD] · [CVE record]
- EPSS
- 0.43% · Oct 25, 2026
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.
Vulnerable and fixed packages
Distribution-reported package versions and fixes. These do not depend on matching against the OpenFactory package catalog.
| Distribution | Package | Release | Version | Status |
|---|---|---|---|---|
| Debian | rabbitmq-server | sid | 4.3.6-1 | fixed |
| Debian | rabbitmq-server | forky | 4.3.6-1 | fixed |
| Debian | rabbitmq-server | trixie | 4.0.5-6+deb13u2 | not affected |
| Debian | rabbitmq-server | bookworm | 3.10.8-1.1+deb12u1 | not affected |
| Debian | rabbitmq-server | bookworm-security | 3.10.8-1.1+deb12u1 | not affected |
| Cpe | rabbitmq_server | Not reported | 4.3.2 | fixed |
| Ubuntu | rabbitmq-server | pro | 3.7.8-4ubuntu2 | vulnerable |
| Ubuntu | rabbitmq-server | pro | 3.7.18-1 | vulnerable |
| Ubuntu | rabbitmq-server | pro | 3.8.2-0ubuntu1 | vulnerable |
| Ubuntu | rabbitmq-server | pro | 3.8.2-0ubuntu1.1 | vulnerable |
| Ubuntu | rabbitmq-server | pro | 3.8.2-0ubuntu1.2 | vulnerable |
| Ubuntu | rabbitmq-server | pro | 3.8.2-0ubuntu1.3 | vulnerable |
| Ubuntu | rabbitmq-server | pro | 3.8.2-0ubuntu1.4 | vulnerable |
| Ubuntu | rabbitmq-server | pro | 3.8.2-0ubuntu1.5 | vulnerable |
| Ubuntu | rabbitmq-server | pro | 3.8.3-0ubuntu0.1 | vulnerable |
| Ubuntu | rabbitmq-server | pro | 3.8.3-0ubuntu0.2 | vulnerable |
| Ubuntu | rabbitmq-server | pro | 3.8.3-0ubuntu0.3 | vulnerable |
| Ubuntu | rabbitmq-server | pro | 3.8.3-0ubuntu0.3+esm1 | vulnerable |
| Ubuntu | rabbitmq-server | pro | 3.8.3-0ubuntu0.3+esm2 | vulnerable |
| Ubuntu | rabbitmq-server | 22.04 | 3.8.9-3ubuntu1 | vulnerable |
| Ubuntu | rabbitmq-server | 22.04 | 3.9.8-1 | vulnerable |
| Ubuntu | rabbitmq-server | 22.04 | 3.9.8-2 | vulnerable |
| Ubuntu | rabbitmq-server | 22.04 | 3.9.8-3 | vulnerable |
| Ubuntu | rabbitmq-server | 22.04 | 3.9.8-5 | vulnerable |
| Ubuntu | rabbitmq-server | 22.04 | 3.9.8-6 | vulnerable |
| Ubuntu | rabbitmq-server | 22.04 | 3.9.13-1 | vulnerable |
| Ubuntu | rabbitmq-server | 22.04 | 3.9.13-1ubuntu0.22.04.1 | vulnerable |
| Ubuntu | rabbitmq-server | 22.04 | 3.9.13-1ubuntu0.22.04.2 | vulnerable |
| Ubuntu | rabbitmq-server | 22.04 | 3.9.27-0ubuntu0.1 | vulnerable |
| Ubuntu | rabbitmq-server | 22.04 | 3.9.27-0ubuntu0.2 | vulnerable |
| Ubuntu | rabbitmq-server | 22.04 | 3.9.27-0ubuntu0.5 | vulnerable |
| Ubuntu | rabbitmq-server | 22.04 | 3.9.27-0ubuntu0.6 | vulnerable |
| Ubuntu | rabbitmq-server | 24.04 | 3.12.1-1 | vulnerable |
| Ubuntu | rabbitmq-server | 24.04 | 3.12.1-1ubuntu1 | vulnerable |
| Ubuntu | rabbitmq-server | 24.04 | 3.12.1-1ubuntu1.2 | vulnerable |
| Ubuntu | rabbitmq-server | 24.04 | 3.12.1-1ubuntu1.4 | vulnerable |
| Ubuntu | rabbitmq-server | 24.04 | 3.12.1-1ubuntu1.6 | vulnerable |
| Ubuntu | rabbitmq-server | 24.04 | 3.12.1-1ubuntu1.7 | vulnerable |
| Ubuntu | rabbitmq-server | 26.04 | 4.0.5-8ubuntu2 | vulnerable |
| Ubuntu | rabbitmq-server | 26.04 | 4.0.5-10ubuntu1 | vulnerable |
| Ubuntu | rabbitmq-server | 26.04 | 4.0.5-10ubuntu2 | vulnerable |
| Ubuntu | rabbitmq-server | 26.04 | 4.0.5-10ubuntu3 | vulnerable |
| Ubuntu | rabbitmq-server | 26.04 | 4.0.5-10ubuntu4 | vulnerable |
| Ubuntu | rabbitmq-server | 26.04 | 4.0.5-10ubuntu5 | vulnerable |
| Ubuntu | rabbitmq-server | 26.04 | 4.0.5-10ubuntu5.1 | vulnerable |
| Ubuntu | rabbitmq-server | 26.04 | 4.0.5-10ubuntu5.2 | vulnerable |
Fixed-version evidence
| Distribution | Package | Type | Release | Fixed version | Urgency | Origin | Bugs |
|---|---|---|---|---|---|---|---|
| Debian | rabbitmq-server | source | sid | 4.3.2-1 | not yet assigned | Not reported | Not reported |
| Debian | rabbitmq-server | source | forky | 4.3.2-1 | not yet assigned | Not reported | Not reported |
| Debian | rabbitmq-server | source | trixie | Not affected | unimportant | Not reported | Not reported |
| Debian | rabbitmq-server | source | bookworm | Not affected | unimportant | Not reported | Not reported |
| Cpe | rabbitmq_server | cpe | Not reported | 4.3.2 | Not reported | NVD-CVE-2026-67234 | Not reported |
OpenFactory catalog packages
[Debian 12 (Bookworm)]
- [rabbitmq-server]Not affected
Details (4)
3.10.8-1.1+deb12u1· all · bookwormNot affected
nvd · rabbitmq-server · debian · bookworm
3.10.8-1.1+deb12u1· all · bookwormNot affected
nvd · rabbitmq-server · debian · bookworm
3.10.8-1.1+deb12u1· all · bookworm-securityNot affected
nvd · rabbitmq-server · debian · bookworm
3.10.8-1.1+deb12u1· all · bookworm-securityNot affected
nvd · rabbitmq-server · debian · bookworm
Observed:
References
- [https://nvd.nist.gov/vuln/detail/CVE-2026-67234]
- [https://osv.dev/vulnerability/DEBIAN-CVE-2026-67234]
- [https://osv.dev/vulnerability/UBUNTU-CVE-2026-67234]
- [https://security-tracker.debian.org/tracker/CVE-2026-67234]
- [https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-67234.json]
- [https://wid.cert-bund.de/.well-known/csaf/white/2026/wid-sec-w-2026-2268.json]
[CERT-Bund public advisories] · [Debian Security Tracker] · [FIRST EPSS] · [National Vulnerability Database (NVD)] · [OSV Package Vulnerability Database] · [Red Hat security advisories and VEX]