CVEvulnerability

CVE-2026-33218

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-1286, CWE-20

Description

NATS-Server is a High-Performance server for NATS.io, a cloud and edge native messaging system. Prior to versions 2.11.15 and 2.12.6, a client which can connect to the leafnode port can crash the nats-server with a certain malformed message pre-authentication. Versions 2.11.15 and 2.12.6 contain a fix. As a workaround, disable leafnode support if not needed or restrict network connections to the leafnode port, if plausible without compromising the service offered.

Affected configurations

• linuxfoundation nats-server (< 2.11.15) • linuxfoundation nats-server (>= 2.12.0 < 2.12.6)

Related

Weakness · CWE (2)

  • CWE-1286 Improper Validation of Syntactic Correctness of Input weakness
  • CWE-20 Improper Input Validation weakness

References