Vulnerability Report

CVE-2026-33222

Title: JetStream Admin API Privilege Escalation in NATS-Server

Auth Bypass

Proof Of Concept

No public PoC currently indexed for CVE-2026-33222.

CWE Category CWE-285

Published Date Mar 25, 2026

Modified Date Mar 26, 2026

Exploit Status Not Found

Score 4.9 CVSS v3.1

Exploit Probability (EPSS)

0.01%

Vulnerability Summary

CVE-2026-33222: 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.

Impacted Vendors

linuxfoundation 1

Reference Links

https://advisories.nats.io/CVE/secnote-2026-12.txt https://github.com/nats-io/nats-server/security/advisories/GHSA-9983-vrx2-fg9c

CVSS v3.1

Source Entity [email protected]

Severity MEDIUM

4.9

Attack Vector

NETWORK

Complexity

LOW

Privileges

N/A

Interaction

NONE

Confidentiality

N/A

Integrity

N/A

Availability

N/A

Scope

UNCHANGED

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

Associated Attack Patterns (CAPEC)

Total: Patterns

CVE-2026-33222 Exploits & PoCs (Proof Of Concept)

No public PoCs found in our database for this CVE.

March 26, 2026 MODIFIED

Vulnerability data updated via NVD.

March 26, 2026 MODIFIED

Vulnerability data updated via NVD.

March 26, 2026 MODIFIED

Vulnerability data updated via NVD.

March 25, 2026 MODIFIED

Vulnerability data updated via NVD.

Attack Vector Matrix

Access Vector NETWORK

Complexity LOW

Privileges N/A

Interaction NONE

CVSS Vector String


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

Affected Stack

No specific products linked.