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.
Metrics
Affected Vendors & Products
References
History
Tue, 20 Oct 2026 13:45:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| First Time appeared |
Broadcom
Broadcom rabbitmq Server |
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| CPEs | cpe:2.3:a:broadcom:rabbitmq_server:*:*:*:*:*:*:*:* | |
| Vendors & Products |
Broadcom
Broadcom rabbitmq Server |
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| Metrics |
cvssV3_1
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Sat, 26 Sep 2026 11:45:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| First Time appeared |
Rabbitmq
Rabbitmq rabbitmq-server |
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| Vendors & Products |
Rabbitmq
Rabbitmq rabbitmq-server |
Fri, 25 Sep 2026 21:30:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| Metrics |
ssvc
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Fri, 25 Sep 2026 16:30:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| Description | 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. | |
| Title | RabbitMQ: Non-RFC-conformant cookie name when clearing the auth-mechanism preference | |
| Weaknesses | CWE-20 | |
| References |
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| Metrics |
cvssV4_0
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Status: PUBLISHED
Assigner: GitHub_M
Published: 2026-09-25T16:03:38.161Z
Updated: 2026-09-25T19:53:58.560Z
Reserved: 2026-07-28T19:50:39.438Z
Link: CVE-2026-67234
Updated: 2026-09-25T19:53:55.201Z
Status : Analyzed
Published: 2026-09-25T17:17:11.743
Modified: 2026-10-20T13:30:15.557
Link: CVE-2026-67234
No data.