This page tracks the Ubuntu fix status. The vulnerability itself is described on the main CVE page. View CVE-2026-67236 →

UBUNTU-CVE-2026-67236

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...

Original description

The description as published by the source.

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.

Source: OSV.dev (Open Source Vulnerabilities) OSV

Affected packages

Ubuntu:Pro:16.04:LTS rabbitmq-server

[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"3.5.7-1ubuntu0.16.04.4+esm3"}]}]

Ubuntu:Pro:18.04:LTS rabbitmq-server

[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"3.6.10-1ubuntu0.5+esm1"}]}]

Ubuntu:Pro:20.04:LTS rabbitmq-server

[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"3.8.3-0ubuntu0.3+esm2"}]}]

Ubuntu:22.04:LTS rabbitmq-server

[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"3.9.27-0ubuntu0.6"}]}]

Ubuntu:24.04:LTS rabbitmq-server

[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"3.12.1-1ubuntu1.7"}]}]

Ubuntu:26.04:LTS rabbitmq-server

[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.0.5-10ubuntu5.2"}]}]

References

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