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CVE PROGRAM SOURCE RECORD6.9 Medium

CVE-2026-67226

RabbitMQ: Admin-only atom exhaustion: PUT /api/users tags list

Description

RabbitMQ is a messaging and streaming broker. From 4.0.0 until 4.0.22 and 4.1.14 and 4.2.7, Admin-only atom exhaustion: PUT /api/users tags list. settags/2 maps rabbitdatacoercion:toatom/1 over the user's tags list. The 20 MB management body limit fits ~3-4M short tag strings. An administrator can crash the node in a single request by creating a user (or importing definitions) with ~1M unique tag administrator. This issue is fixed in versions 4.0.22 and 4.1.14 and 4.2.7.

Affected products

Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.

rabbitmq rabbitmq-server

  • >= 4.0.0, < 4.0.22affected
  • >= 4.1.0, < 4.1.14affected
  • >= 4.2.0, < 4.2.7affected

References