Bug 2498260 (CVE-2026-58214) - CVE-2026-58214 nats-server: NATS Server: Information disclosure via MQTT client subscription bypass
Summary: CVE-2026-58214 nats-server: NATS Server: Information disclosure via MQTT clie...
Keywords:
Status: NEW
Alias: CVE-2026-58214
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
medium
medium
Target Milestone: ---
Assignee: Product Security
QA Contact:
URL:
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Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2026-07-08 21:02 UTC by OSIDB Bzimport
Modified: 2026-08-24 12:14 UTC (History)
0 users

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Description OSIDB Bzimport 2026-07-08 21:02:39 UTC 
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.
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