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BIT-nats-2026-33222 — NATS JetStream has an authorization bypass through its Management API

Affected: Bitnami: nats

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.

CLEANSTART-2026-YB47349 — Security fix for CVE-2026-33222 applied in: nats-server-fips 2.12.5-r1

Affected: CleanStart: nats-server-fips

Security vulnerability affects the nats-server-fips package. This issue is resolved in later releases. See references for vulnerability details.

EUVD-2026-277583

fkie_cve-2026-33222

GHSA-9983-vrx2-fg9c — NATS JetStream has an authorization bypass through its Management API

Affected: Go: github.com/nats-io/nats-server/v2, Go: github.com/nats-io/nats-server

### Background

NATS.io is a high performance open source pub-sub distributed communication technology, built for the cloud, on-premise, IoT, and edge computing.

The persistent storage feature, JetStream, has a management API which has many features, amongst which are backup and restore.

### Problem Description

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.

### Affected Versions

Any version before v2.12.6 or v2.11.15

### Workarounds

If developers have configured users to have limited JetStream restore permissions, temporarily remove those permissions.

UBUNTU-CVE-2026-33222

Affected: Ubuntu:24.04:LTS: nats-server, Ubuntu:25.10: nats-server, Ubuntu:Pro:26.04:LTS: nats-server

WID-SEC-W-2026-0858 — NATS Server: Mehrere Schwachstellen

Ein entfernter, anonymer Angreifer kann mehrere Schwachstellen in NATS Server ausnutzen, um Informationen offenzulegen oder zu manipulieren, einen Denial-of-Service zu verursachen und Sicherheitsmechanismen zu umgehen.