nats-io nats-server up to 2.11.14/2.12.5 JetStream authorization

Summaryinfo

A vulnerability labeled as problematic has been found in nats-io nats-server up to 2.11.14/2.12.5. This affects an unknown part of the component JetStream. The manipulation results in authorization. This vulnerability is reported as CVE-2026-33222. The attack can be launched remotely. No exploit exists. The affected component should be upgraded.

Detailsinfo

A vulnerability, which was classified as problematic, was found in nats-io nats-server up to 2.11.14/2.12.5. Affected is an unknown part of the component JetStream. The manipulation with an unknown input leads to a authorization vulnerability. CWE is classifying the issue as CWE-639. The system's authorization functionality does not prevent one user from gaining access to another user's data or record by modifying the key value identifying the data. This is going to have an impact on confidentiality, integrity, and availability. CVE summarizes:

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.

The advisory is shared for download at github.com. This vulnerability is traded as CVE-2026-33222. The exploitability is told to be easy. It is possible to launch the attack remotely. Additional levels of successful authentication are required for exploitation. There are neither technical details nor an exploit publicly available.

The vulnerability scanner Nessus provides a plugin with the ID 303831 (Linux Distros Unpatched Vulnerability : CVE-2026-33222), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 2.11.15 or 2.12.6 eliminates this vulnerability.

The vulnerability is also documented in the vulnerability database at Tenable (303831). VulDB is the best source for vulnerability data and more expert information about this specific topic.

Productinfo

Vendor

• nats-io

Name

• nats-server

Version

• 2.11.0
• 2.11.1
• 2.11.2
• 2.11.3
• 2.11.4
• 2.11.5
• 2.11.6
• 2.11.7
• 2.11.8
• 2.11.9
• 2.11.10
• 2.11.11
• 2.11.12
• 2.11.13
• 2.11.14
• 2.12.0
• 2.12.1
• 2.12.2
• 2.12.3
• 2.12.4
• 2.12.5

CPE 2.3info

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CPE 2.2info

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Entryinfo

VulDB is the best source for vulnerability data and more expert information about this specific topic.

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