by Kastro CVE-2026-67404
rabbitmq rabbitmq-server — RabbitMQ: OAuth2 silent verify_none fallback for JWKS fetch
Description · from the CVE record
RabbitMQ is a messaging and streaming broker. Prior to versions 3.13.15, 4.0.20, 4.1.11, 4.2.6, and 4.3.0, When no CA bundle is available, ssl_options/1 falls back to [{verify, verify_none}] with no warning. An attacker in a man-in-the-middle position can forge the JWKS response, which leads the broker to accept arbitrary JWTs. Preconditions include The OAuth2 plugin must be in use with no cacertfile configured and the OS CA bundle empty or unreadable (for example, in a minimal container), and the attacker must hold a network man-in-the-middle position.. This issue is fixed in versions 3.13.15, 4.0.20, 4.1.11, 4.2.6, and 4.3.0.
Affected
ProductAffectedFixed inSource
rabbitmq-server>= 3.13.0, < 3.13.15–CNA
rabbitmq-server>= 4.0.0, < 4.0.20–CNA
rabbitmq-server>= 4.1.0, < 4.1.11–CNA
rabbitmq-server>= 4.2.0, < 4.2.6–CNA
Scores by source
GitHub_M (CNA)9.2CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
CISA ADPSSVCExploitation: none · Automatable: no · Technical impact: total