Description

NATS-Server is a High-Performance server for NATS.io, a cloud and edge native messaging system. Prior to versions 2.11.14 and 2.12.5, if the nats-server has the "leafnode" configuration enabled (not default), then anyone who can connect can crash the nats-server by triggering a panic. This happens pre-authentication and requires that compression be enabled (which it is, by default, when leafnodes are used). Versions 2.11.14 and 2.12.5 contain a fix. As a workaround, disable compression on the leafnode port.

INFO

Published Date :

2026-03-25T19:38:44.587Z

Last Modified :

2026-03-28T01:34:06.528Z

Source :

GitHub_M
AFFECTED PRODUCTS

The following products are affected by CVE-2026-29785 vulnerability.

Vendors Products
Linuxfoundation
  • Nats-server
Nats
  • Nats Server
REFERENCES

Here, you will find a curated list of external links that provide in-depth information to CVE-2026-29785.

URL Resource
https://advisories.nats.io/CVE/secnote-2026-04.txt cve-icon cve-icon cve-icon
https://github.com/nats-io/nats-server/commit/a1488de6f2ba6e666aef0f9cce0016f7f167d6a8 cve-icon cve-icon cve-icon
https://github.com/nats-io/nats-server/security/advisories/GHSA-52jh-2xxh-pwh6 cve-icon cve-icon cve-icon
https://nvd.nist.gov/vuln/detail/CVE-2026-29785 cve-icon
https://www.cve.org/CVERecord?id=CVE-2026-29785 cve-icon
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