VULNERABILITY INTELLIGENCE

CVE-2026-29785

CVSS score7.5 HIGH
EPSS probability0.68%
CISA KEVNot currently listed
Published2026-03-25
Last modified2026-09-09
CVSS vectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

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.

Weakness classification

  • security-advisories@github.com: CWE-476
  • 0b0ca135-0b70-47e7-9f44-1890c2a1c46c: CWE-409

Primary references