Is CVE-2026-33215 actively exploited?

No active exploitation of CVE-2026-33215 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2026-33215 be exploited remotely?

Yes. CVE-2026-33215 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2026-33215?

CVE-2026-33215 has a CVSS score of 6.5 (MEDIUM).

HOME VULNERABILITIESCVE-2026-33215

MEDIUM

CVE-2026-33215

CWE-287Published: March 24, 2026· Updated: Mar 26, 2026

6.5

CVSS v3.1

EPSS:0.01%probability of exploitation in 30 daysPercentile:2.7th

Official Description

NATS-Server is a High-Performance server for NATS.io, a cloud and edge native messaging system. The nats-server provides an MQTT client interface. Prior to versions 2.11.15 and 2.12.5, Sessions and Messages can by hijacked via MQTT Client ID malfeasance. Versions 2.11.15 and 2.12.5 patch the issue. No known workarounds are available.

NVD Source

Technical Analysis

CVE-2026-33215 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.

From a weakness classification perspective (CWE-287): Authentication bypass vulnerabilities allow attackers to access protected resources without valid credentials.