rabbitmq-server: RabbitMQ is a messaging and streaming broker
CVE-2026-67236 is fixed in rabbitmq-server on 1 platform, first by rabbitmq-server 4.0.5-10ubuntu5.2, released September 25, 2026. It is not reported as exploited. Patch Radar priority: Routine.
RabbitMQ is a messaging and streaming broker. From 4.2.0 until 4.2.8 and 4.3.2, a successful POST /login caused is_authorized/2 to set an auth cookie containing base64-encoded username:password credentials without HttpOnly, Secure, SameSite, or expiration protections. Because base64 is encoding rather than encryption, an attacker with same-origin cross-site scripting, an HTTP-readable network position, or local access to the browser cookie store could recover the actual login credentials; older browsers that treated an absent SameSite attribute as None also sent the cookie cross-site. This issue is fixed in versions 4.2.8 and 4.3.2.
Where it's fixed
| Product | Fixed in | Fix | Released |
|---|---|---|---|
| Linux | |||
| rabbitmq-server · Debian 14 | 4.3.2-1 | DEBIAN-CVE-2026-67236 | Sep 26, 2026 |
| rabbitmq-server · Ubuntu 18.04.6 LTS (bionic) | 3.6.10-1ubuntu0.5+esm1 | rabbitmq-server 3.6.10-1ubuntu0.5+esm1 | Oct 19, 2026 |
| rabbitmq-server · Ubuntu 20.04 LTS (focal) | 3.8.3-0ubuntu0.3+esm2 | rabbitmq-server 3.8.3-0ubuntu0.3+esm2 | Oct 19, 2026 |
| rabbitmq-server · Ubuntu 22.04.1 LTS (jammy) | 3.9.27-0ubuntu0.6 | rabbitmq-server 3.9.27-0ubuntu0.6 | Oct 19, 2026 |
| rabbitmq-server · Ubuntu 24.04.5 LTS (noble) | 3.12.1-1ubuntu1.7 | rabbitmq-server 3.12.1-1ubuntu1.7 | Oct 19, 2026 |
| rabbitmq-server · Ubuntu 26.04.1 LTS (resolute) | 4.0.5-10ubuntu5.2 | rabbitmq-server 4.0.5-10ubuntu5.2 | Sep 25, 2026 |
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