Bug 2498249 (CVE-2026-58213) - CVE-2026-58213 nats-server: NATS Server: Protocol stream corruption and unintended operation injection via MQTT client subscription filters
Summary: CVE-2026-58213 nats-server: NATS Server: Protocol stream corruption and unint...
Keywords:
Status: NEW
Alias: CVE-2026-58213
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
high
high
Target Milestone: ---
Assignee: Product Security
QA Contact:
URL:
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Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2026-07-08 21:01 UTC by OSIDB Bzimport
Modified: 2026-08-24 12:14 UTC (History)
0 users

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Description OSIDB Bzimport 2026-07-08 21:01:52 UTC 
NATS Server is a high-performance server for NATS.io, the cloud and edge native messaging system. Prior to 2.14.1 and 2.12.9, an MQTT client could include protocol control characters in subscription filters that were later forwarded as NATS protocol data to route or leafnode connections, corrupting the forwarded protocol stream and allowing injection of unintended NATS protocol operations. This issue is fixed in versions 2.14.1 and 2.12.9.
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