Incorrect Authorization Affecting github.com/nats-io/nats-server/v2/server package, versions <2.11.15>=2.12.0-RC.1 <2.12.6
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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- published25 Mar 2026
- disclosed24 Mar 2026
- creditUnknown
Introduced: 24 Mar 2026
CVE-2026-33222 Â (opens in a new tab)How to fix?
Upgrade github.com/nats-io/nats-server/v2/server to version 2.11.15, 2.12.6 or higher.
Overview
github.com/nats-io/nats-server/v2/server is an A simple, secure and performant communications system for digital systems, services and devices.
Affected versions of this package are vulnerable to Incorrect Authorization via the Management API restore process. An attacker can modify or overwrite data in unauthorized streams by restoring to stream names they should not have access to. This is only exploitable if a user has JetStream admin API access to the restore functionality.
Workaround
This vulnerability can be mitigated by temporarily removing JetStream restore permissions from users with limited restore access.