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.
Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).
| Vendor | Product | Default status | Versions | |||||||||
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| nats-io | nats-server | affected |
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References
History
Wed, 08 Jul 2026 20:15:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| Description | 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. | |
| Title | NATS Server: Pre-auth server crash via double INFO in leafnode handshake | |
| Weaknesses | CWE-476 | |
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| Metrics |
cvssV3_1
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MITRE
Status: PUBLISHED
Assigner: GitHub_M
Published:
Updated: 2026-07-08T19:48:55.058Z
Reserved: 2026-06-29T21:54:30.330Z
Link: CVE-2026-58250
Vulnrichment
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NVD
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Redhat
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OpenCVE Enrichment
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Weaknesses