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Details of issue NIXPKGS-2026-0771

NIXPKGS-2026-0771
published on
Permalink CVE-2026-33217
7.1 HIGH
  • CVSS version: 3.1
  • Attack vector (AV): NETWORK
  • Attack complexity (AC): LOW
  • Privileges required (PR): LOW
  • User interaction (UI): NONE
  • Scope (S): UNCHANGED
  • Confidentiality impact (C): LOW
  • Integrity impact (I): HIGH
  • Availability impact (A): NONE
updated 1 month, 1 week ago by @LeSuisse Activity log
  • Created suggestion 1 month, 1 week ago
  • @LeSuisse accepted 1 month, 1 week ago
  • @LeSuisse published on GitHub 1 month, 1 week ago
NATS allows MQTT clients to bypass ACL checks

NATS-Server is a High-Performance server for NATS.io, a cloud and edge native messaging system. Prior to versions 2.11.15 and 2.12.6, when using ACLs on message subjects, these ACLs were not applied in the `$MQTT.>` namespace, allowing MQTT clients to bypass ACL checks for MQTT subjects. Versions 2.11.15 and 2.12.6 contain a fix. No known workarounds are available.

Affected products

nats-server
  • ==< 2.11.15
  • ==>= 2.12.0-RC.1, < 2.12.6

Matching in nixpkgs

Package maintainers

Upstream advisory: https://github.com/nats-io/nats-server/security/advisories/GHSA-jxxm-27vp-c3m5