CVE-2026-67419 RabbitMQ: Consecutive topic wildcards cause combinatorial routing work

RabbitMQ is a messaging and streaming broker. Prior to 4.3.5, an authenticated user who can bind a queue to a topic exchange and publish to it can use consecutive segments in a binding key to make both topic matchers revisit the same trie-node and routing-key-suffix states without memoization. Th...

CVE-2026-67419 RabbitMQ: Consecutive topic wildcards cause combinatorial routing work

RabbitMQ is a messaging and streaming broker. Prior to 4.3.5, an authenticated user who can bind a queue to a topic exchange and publish to it can use consecutive segments in a binding key to make both topic matchers revisit the same trie-node and routing-key-suffix states without memoization. Th...

CVE-2026-67419

Prior to version 4.3.5 , RabbitMQ is vulnerable to a flaw where an authenticated user can trigger combinatorial CPU work and memory pressure. By binding a queue to a topic exchange and publishing a message with consecutive # segments in a binding key, the attacker forces topic matchers to revisit...

CVE-2026-67407 RabbitMQ: Incomplete fix for CVE-2026-44838: `escape_regex_char/1` does not escape `-`, leaving room for an MQTT topic permission bypass

RabbitMQ is a messaging and streaming broker. From 4.0.0 until 4.3.3 and 4.2.9 and 4.1.14 and 4.0.23, Incomplete fix for CVE-2026-44838: escaperegexchar/1 does not escape -, leaving room for an MQTT topic permission bypass. the CVE-2026-44838 fix made expandtopicpermission/2 escape regex...

CVE-2026-67407

The RabbitMQ messaging and streaming broker is affected by an incomplete fix for CVE-2026-44838 . The underlying cause is that the escaperegexchar/1 function fails to escape the hyphen (-) character, while it does escape other metacharacters. This oversight allows a low-privileged authenticated M...

CVE-2026-67407 RabbitMQ: Incomplete fix for CVE-2026-44838: `escape_regex_char/1` does not escape `-`, leaving room for an MQTT topic permission bypass

RabbitMQ is a messaging and streaming broker. From 4.0.0 until 4.3.3 and 4.2.9 and 4.1.14 and 4.0.23, Incomplete fix for CVE-2026-44838: escaperegexchar/1 does not escape -, leaving room for an MQTT topic permission bypass. the CVE-2026-44838 fix made expandtopicpermission/2 escape regex...

CVE-2026-67407 RabbitMQ: Incomplete fix for CVE-2026-44838: `escape_regex_char/1` does not escape `-`, leaving room for an MQTT topic permission bypass

RabbitMQ is a messaging and streaming broker. From 4.0.0 until 4.3.3 and 4.2.9 and 4.1.14 and 4.0.23, Incomplete fix for CVE-2026-44838: escaperegexchar/1 does not escape -, leaving room for an MQTT topic permission bypass. the CVE-2026-44838 fix made expandtopicpermission/2 escape regex...

EUVD-2026-87228

RabbitMQ is a messaging and streaming broker. From 4.0.0 until 4.0.23, 4.1.14, 4.2.9, and 4.3.3, the optional rabbitmqjmstopicexchange plugin's x-jms-topic exchange accepted a client-controlled rjmserlangselector binding expression whose LIKE evaluator expanded percent and underscore wildcards in...

CVE-2026-67413 RabbitMQ: Authenticated RabbitMQ JMS Topic Selector Users Can Consume Broker CPU with an Unbounded LIKE Regular Expression

RabbitMQ is a messaging and streaming broker. From 4.0.0 until 4.0.23, 4.1.14, 4.2.9, and 4.3.3, the optional rabbitmqjmstopicexchange plugin's x-jms-topic exchange accepted a client-controlled rjmserlangselector binding expression whose LIKE evaluator expanded percent and underscore wildcards in...

CVE-2026-67413 RabbitMQ: Authenticated RabbitMQ JMS Topic Selector Users Can Consume Broker CPU with an Unbounded LIKE Regular Expression

RabbitMQ is a messaging and streaming broker. From 4.0.0 until 4.0.23, 4.1.14, 4.2.9, and 4.3.3, the optional rabbitmqjmstopicexchange plugin's x-jms-topic exchange accepted a client-controlled rjmserlangselector binding expression whose LIKE evaluator expanded percent and underscore wildcards in...

CVE-2026-67413 RabbitMQ: Authenticated RabbitMQ JMS Topic Selector Users Can Consume Broker CPU with an Unbounded LIKE Regular Expression

RabbitMQ is a messaging and streaming broker. From 4.0.0 until 4.0.23, 4.1.14, 4.2.9, and 4.3.3, the optional rabbitmqjmstopicexchange plugin's x-jms-topic exchange accepted a client-controlled rjmserlangselector binding expression whose LIKE evaluator expanded percent and underscore wildcards in...

PT-2026-98924

Name of the Vulnerable Software and Affected Versions RabbitMQ versions prior to 4.3.5 Description An authenticated user with permissions to bind a queue to a topic exchange and publish to it can cause a denial of service. By using consecutive segments in a binding key, the user can force topic...

CVE-2026-67413: Inefficient Regular Expression Complexity

RabbitMQ is a messaging and streaming broker. From 4.0.0 until 4.0.23, 4.1.14, 4.2.9, and 4.3.3, the optional rabbitmqjmstopicexchange plugin's x-jms-topic exchange accepted a client-controlled rjmserlangselector binding expression whose LIKE evaluator expanded percent and underscore wildcards in...

Linux Distros Unpatched Vulnerability : CVE-2026-67419

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available. - RabbitMQ is a messaging and streaming broker. Prior to 4.3.5, an authenticated user who can bind a queue to a topic exchange and publish to it can use consecuti...

CVE-2026-67419: Inefficient Algorithmic Complexity

RabbitMQ is a messaging and streaming broker. Prior to 4.3.5, an authenticated user who can bind a queue to a topic exchange and publish to it can use consecutive segments in a binding key to make both topic matchers revisit the same trie-node and routing-key-suffix states without memoization. Th...

Linux Distros Unpatched Vulnerability : CVE-2026-67407

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available. - RabbitMQ is a messaging and streaming broker. From 4.0.0 until 4.3.3 and 4.2.9 and 4.1.14 and 4.0.23, Incomplete fix for CVE-2026-44838: escaperegexchar/1 does...

Linux Distros Unpatched Vulnerability : CVE-2026-67413

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available. - RabbitMQ is a messaging and streaming broker. From 4.0.0 until 4.0.23, 4.1.14, 4.2.9, and 4.3.3, the optional rabbitmqjmstopicexchange plugin's x-jms-topic...

CVE-2026-91119 Discourse: Encode action_code_who in mention URLs

Discourse is an open-source discussion platform. Prior to 2026.1.8, 2026.6.3, 2026.7.2, and 2026.8.0, the topic small-action and nested-activity-log components interpolated the free-form actioncodewho value into mention-link href attributes without URL encoding. A quote-bearing display name could...

EUVD-2026-86307

Discourse is an open-source discussion platform. Prior to 2026.1.8, 2026.6.3, 2026.7.2, and 2026.8.0, the topic small-action and nested-activity-log components interpolated the free-form actioncodewho value into mention-link href attributes without URL encoding. A quote-bearing display name could...

CVE-2026-91119 Discourse: Encode action_code_who in mention URLs

Discourse is an open-source discussion platform. Prior to 2026.1.8, 2026.6.3, 2026.7.2, and 2026.8.0, the topic small-action and nested-activity-log components interpolated the free-form actioncodewho value into mention-link href attributes without URL encoding. A quote-bearing display name could...