RabbitMQ: Unauthenticated disclosure of OAuth client credentials via an HTTP API endpoint with certain less common OAuth 2 configurations

• azl3 rabbitmq-server 3.13.7-6 on Azure Linux 3.0

• azl4 rabbitmq-server 4.0.9-9.azl4 on Azure Linux 4.0

SecurityAlert records field-level changes from the point we begin following a bulletin. Earlier vendor changes may not have a field-by-field record.

1. Oct 22, 2026 at 7:40 AM UTC
   • Added affected products: azl4 rabbitmq-server 4.0.9-9.azl4 on Azure Linux 4.0.
   • Added fixed versions: 0:4.0.9-9.azl4.
   • The vendor changed its remediation guidance.

1. Jul 15, 2026 at 1:02 AM UTC
   Published by Microsoft Security Response Center

   The publication date reported by the vendor.

2. Sep 3, 2026 at 11:40 PM UTC
   Added to SecurityAlert

   We collected the advisory from the official source.

3. Oct 22, 2026 at 1:12 AM UTC
   Updated by Microsoft Security Response Center

   The vendor changed the advisory after it was first published.

4. Oct 28, 2026 at 3:45 AM UTC
   Confirmed at the source

   Our collector saw this advisory during a later source check.