Signal is active with 1 mentions in latest observed window
Recommended action window: Monitor and triage in normal cycle
NVD description
NATS Server is a high-performance server for NATS.io, the cloud and edge native messaging system. Prior to 2.14.3 and 2.12.12, an authenticated MQTT client could subscribe to the internal $MQTT.deliver.pubrel subject family, bypassing configured subscribe permissions and exposing MQTT QoS2 protocol metadata for sessions in the account. This issue is fixed in versions 2.14.3 and 2.12.12.
Priority
LOW
Exploitation
NONE
PoC
NONE
Patch
AVAILABLE
Momentum
NONE
If you run products in this scope, you should treat this CVE as relevant to your environment.
🟠 NATS Server, MQTT Subscribe ACL Bypass, #CVE-2026-58214 (Medium) -DC-Jul2026-917 https://dailycve.com/nats-server-mqtt-subscribe-acl-bypass-cve-2026-58214-medium-dc-jul2026-917/
Post summary
A new CVE (CVE-2026-58214) impacts NATS Server with an MQTT Subscribe ACL bypass rated as Medium; the post contains no PoC, exploit, or patch details.
1 of 1 entries
| Part | Vendor | Product | Version | Target SW | Target HW |
|---|---|---|---|---|---|
| App | linuxfoundation | nats-server | - | - | - |