Authorization Bypass Through User-Controlled Key Affecting nats-server2.12 package, versions <0:2.12.12-1.hum1


Severity

Recommended
0.0
medium
0
10

Based on Red Hat Enterprise Linux security rating.

Threat Intelligence

EPSS
0.35% (28th percentile)

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  • Snyk IDSNYK-RHEL10-NATSSERVER212-19214374
  • published23 Aug 2026
  • disclosed8 Jul 2026

Introduced: 8 Jul 2026

CVE-2026-58214  (opens in a new tab)
CWE-639  (opens in a new tab)

How to fix?

Upgrade RHEL:10 nats-server2.12 to version 0:2.12.12-1.hum1 or higher.
This issue was patched in RHSA-2026:36017.

NVD Description

Note: Versions mentioned in the description apply only to the upstream nats-server2.12 package and not the nats-server2.12 package as distributed by RHEL. See How to fix? for RHEL:10 relevant fixed versions and status.

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.

CVSS Base Scores

version 3.1