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Packages - rabbitmq-server - AMQP server written in Erlang Details It was discovered that RabbitMQ Server incorrectly handled CORS wildcard origin configuration. An attacker could possibly use this issue to cause a cross-site request forgery attack. This issue only affected Ubuntu 18.04 LTS, Ubuntu 20.04 LTS, Ubuntu 22.04 LTS, Ubuntu 24.04 LTS, and Ubuntu 26.04 LTS. (CVE-2026-66070) It was discovered that RabbitMQ Server incorrectly handled TLS peer-certificate DNs in the management UI. An attacker could possibly use this issue to cause a cross-site scripting attack. (CVE-2026-66077) It was discovered that RabbitMQ Server incorrectly handled AMQP 1.0 arrays with zero-width element constructors. An attacker could possibly use this issue to cause a denial of service. This issue only affected Ubuntu 20.04 LTS, Ubuntu 22.04 LTS, Ubuntu 24.04 LTS, and Ubuntu 26.04 LTS. ( It was discovered that RabbitMQ Server incorrectly handled CORS wildcard origin configuration. An attacker could possibly use this issue to cause a cross-site request forgery attack. This issue only affected Ubuntu 18.04 LTS, Ubuntu 20.04 LTS, Ubuntu 22.04 LTS, Ubuntu 24.04 LTS, and Ubuntu 26.04 LTS. (CVE-2026-66070) It was discovered that RabbitMQ Server incorrectly handled TLS peer-certificate DNs in the management UI. An attacker could possibly use this issue to cause a cross-site scripting attack. (CVE-2026-66077) It was discovered that RabbitMQ Server incorrectly handled AMQP 1.0 arrays with zero-width element constructors. An attacker could possibly use this issue to cause a denial of service. This issue only affected Ubuntu 20.04 LTS, Ubuntu 22.04 LTS, Ubuntu 24.04 LTS, and Ubuntu 26.04 LTS. (CVE-2026-66079) It was discovered that RabbitMQ Server trust-store plugin incorrectly validated client certificates. An attacker could possibly use this issue to bypass TLS client authentication. This issue only affected Ubuntu 18.04 LTS, Ubuntu 20.04 LTS, Ubuntu 22.04 LTS, Ubuntu 24.04 LTS, and Ubuntu 26.04 LTS. (CVE-2026-67231) It was discovered that RabbitMQ Server incorrectly handled WebSocket frame sizes. An attacker could possibly use this issue to cause a denial of service. This issue only affected Ubuntu 20.04 LTS, Ubuntu 22.04 LTS, Ubuntu 24.04 LTS, and Ubuntu 26.04 LTS. (CVE-2026-67232) It was discovered that RabbitMQ Server incorrectly handled content-header body sizes. An attacker could possibly use this issue to cause a denial of service. (CVE-2026-67235) It was discovered that RabbitMQ Server incorrectly stored credentials in an insecure cookie. An attacker could possibly use this issue to expose sensitive information. This issue only affected Ubuntu 20.04 LTS, Ubuntu 22.04 LTS, Ubuntu 24.04 LTS, and Ubuntu 26.04 LTS. (CVE-2026-67236) It was discovered that RabbitMQ Server incorrectly handled OAuth bearer tokens in bootstrap JavaScript. An attacker could possibly use this issue to cause a cross-site scripting attack. This issue only affected Ubuntu 24.04 LTS and Ubuntu 26.04 LTS. (CVE-2026-67237) It was discovered that RabbitMQ Server incorrectly handled ETF-encoded PID node names. An attacker could possibly use this issue to cause a denial of service. This issue only affected Ubuntu 22.04 LTS, Ubuntu 24.04 LTS, and Ubuntu 26.04 LTS. (CVE-2026-67238) It was discovered that RabbitMQ Server incorrectly handled TLS peer-certificate DNs in the stream management UI. An attacker could possibly use this issue to cause a cross-site scripting attack. This issue only affected Ubuntu 22.04 LTS, Ubuntu 24.04 LTS, and Ubuntu 26.04 LTS. (CVE-2026-67239) It was discovered that RabbitMQ Server incorrectly handled OAuth2 SSL options when no CA certificates were available. An attacker could possibly use this issue to bypass TLS verification. This issue only affected Ubuntu 26.04 LTS. (CVE-2026-67404) It was discovered that RabbitMQ Server incorrectly validated HTTP response status codes when fetching JWKS keys. An attacker could possibly use this issue to cause a denial of service. This issue only affected Ubuntu 22.04 LTS, Ubuntu 24.04 LTS, and Ubuntu 26.04 LTS. (CVE-2026-67409) Update instructions In general, a standard system update will make all the necessary changes. After a standard system update you need to restart rabbitmq-server to make all the necessary changes. Learn more about how to get the fixes.The problem can be corrected by updating your system to the following package versions: | Ubuntu Release | Package Version | || |---|---|---|---| | 26.04 LTS resolute | rabbitmq-server – 4.0.5-10ubuntu5.2 | || | 24.04 LTS noble | rabbitmq-server – 3.12.1-1ubuntu1.7 | || | 22.04 LTS jammy | rabbitmq-server – 3.9.27-0ubuntu0.6 | || | 20.04 LTS focal | rabbitmq-server – 3.8.3-0ubuntu0.3+esm2 | || | 18.04 LTS bionic | rabbitmq-server – 3.6.10-1ubuntu0.5+esm1 | || | 16.04 LTS xenial | rabbitmq-server – 3.5.7-1ubuntu0.16.04.4+esm3 | Reduce your security exposure Ubuntu Pro provides ten-year security coverage to 25,000+ packages in Main and Universe repositories, and it is free for up to five machines. References - CVE-2026-67409 - CVE-2026-67404 - CVE-2026-67239 - CVE-2026-67238 - CVE-2026-67237 - CVE-2026-67236 - CVE-2026-67235 - CVE-2026-67232 - CVE-2026-67231 - CVE-2026-66079 - CVE-2026-67409 - CVE-2026-67404 - CVE-2026-67239 - CVE-2026-67238 - CVE-2026-67237 - CVE-2026-67236 - CVE-2026-67235 - CVE-2026-67232 - CVE-2026-67231 - CVE-2026-66079 - CVE-2026-66077 - CVE-2026-66070