nats-io/nats-server · Security
NATS JetStream has an authorization bypass through its Management API
- GHSA ID
- GHSA-9983-vrx2-fg9c
- CVE ID
- CVE-2026-33222
- Severity
- medium
- Published
- Updated
- CVSS
- 4.9 · CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:H/A:N
- CVSS v3
- 4.9 · CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:H/A:N
Description
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.
CWEs
- CWE-285 · Improper Authorization