CVE-2026-58252

NATS Server is a high-performance server for NATS.io, the cloud and edge native messaging system. Prior to 2.14.0, 2.12.7, and 2.11.16, an authenticated user could receive messages on denied subjects when a wildcard subscription overlapped with a configured wildcard deny rule but was not a subset...

CVE-2026-58252 NATS Server: Subscribe Authz Bypass via Wildcard-Overlap

NATS Server is a high-performance server for NATS.io, the cloud and edge native messaging system. Prior to 2.14.0, 2.12.7, and 2.11.16, an authenticated user could receive messages on denied subjects when a wildcard subscription overlapped with a configured wildcard deny rule but was not a subset...

PT-2026-56564

Name of the Vulnerable Software and Affected Versions NATS Server versions prior to 2.14.0 NATS Server versions prior to 2.12.7 NATS Server versions prior to 2.11.16 Description An authenticated user can receive messages on denied subjects. This occurs when a wildcard subscription overlaps with a...

Authentication Bypass

github.com/nats-io/nats-server is vulnerable to Authentication bypass. The vulnerability is due to a failure to enforce negative user permissions in one scenario. Attackers can exploit this by using a queue subscription on the wildcard to access denied subjects...

CVE-2022-29946

NATS.io NATS Server before 2.8.2 and Streaming Server before 0.24.6 could allow a remote attacker to bypass security restrictions, caused by the failure to enforce negative user permissions in one scenario. By using a queue subscription on the wildcard, an attacker could exploit this vulnerabilit...