CVE-2026-33222 MEDIUM

CVE-2026-33222: NATS JetStream has an authorization bypass through its Management API

Vendor Nats-Io
Product nats-server
Weakness CWE-285
Published March 25, 2026
Last update March 26, 2026
View on NVD All CVEs

CVSS base score

4.9/10
Attack vector Network
Attack complexity Low
Privileges required High
User interaction None
Confidentiality None
Integrity High

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:H/A:N

What the vulnerability does

01Description

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, users with JetStream admin API access to restore one stream could restore to other stream names, impacting data which should have been protected against them. Versions 2.11.15 and 2.12.6 contain a fix. As a workaround, if developers have configured users to have limited JetStream restore permissions, temporarily remove those permissions.

Key dates

02Disclosure timeline

March 25, 2026 CVE published
March 26, 2026 Record updated