Bug 2498257 (CVE-2026-58250) - CVE-2026-58250 github.com/nats-io/nats-server: NATS Server: Denial of Service via repeated leafnode INFO messages during pre-authentication
Summary: CVE-2026-58250 github.com/nats-io/nats-server: NATS Server: Denial of Service...
Keywords:
Status: NEW
Alias: CVE-2026-58250
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
high
high
Target Milestone: ---
Assignee: Product Security
QA Contact:
URL:
Whiteboard:
Depends On: 2498418
Blocks:
TreeView+ depends on / blocked
 
Reported: 2026-07-08 21:02 UTC by OSIDB Bzimport
Modified: 2026-07-13 06:12 UTC (History)
0 users

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Description OSIDB Bzimport 2026-07-08 21:02:27 UTC 
NATS Server is a high-performance server for NATS.io, the cloud and edge native messaging system. Prior to 2.12.8 and 2.11.17, an unauthenticated peer with network access to a leafnode listener with compression enabled could crash the server during the pre-authentication leafnode handshake by sending repeated leafnode INFO protocol messages before authentication and account setup completed. This issue is fixed in versions 2.12.8 and 2.11.17.
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