CVEvulnerability

CVE-2026-29785

7.5 HIGH Published 2026-03-25 Modified 2026-09-09 Official page ↗
Status
Modified
Published
2026-03-25
Last modified
2026-09-09
Assigner
[email protected]
CVSS 3.1 ([email protected])
7.5 HIGH — CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CVSS 3.1 (0b0ca135-0b70-47e7-9f44-1890c2a1c46c)
7.5 HIGH — CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Weaknesses
CWE-409, CWE-476

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.

Affected configurations

• linuxfoundation nats-server (< 2.11.14) • linuxfoundation nats-server (>= 2.12.0 < 2.12.5)

Related

Weakness · CWE (2)

  • CWE-409 Improper Handling of Highly Compressed Data (Data Amplification) weakness
  • CWE-476 NULL Pointer Dereference weakness

References