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VULNERABILITIES

CVE-2026-33217 Details

Description

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, when using ACLs on message subjects, these ACLs were not applied in the `$MQTT.>` namespace, allowing MQTT clients to bypass ACL checks for MQTT subjects. Versions 2.11.15 and 2.12.6 contain a fix. No known workarounds are available.

Metrics

CVSS 3.x Severity and Vector Strings:

NIST: [email protected]CVSS-B:6.5 MEDIUMVector:CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N
CNA: redhat-SADPCVSS-B:8.1 HIGHVector:CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N

References to Advisories, Solutions, and Tools

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URLSource(s)Tag(s)
https://access.redhat.com/errata/RHSA-2026:21769 redhat-SADP
https://access.redhat.com/errata/RHSA-2026:22347 redhat-SADP
https://access.redhat.com/errata/RHSA-2026:23345 redhat-SADP
https://access.redhat.com/security/cve/CVE-2026-33217 redhat-SADP
https://bugzilla.redhat.com/show_bug.cgi?id=2451446 redhat-SADP

see all 8 references

Weakness Enumeration

CWE-IDCWE NameSource
CWE-425Direct Request ('Forced Browsing')redhat-SADP
CWE-863Incorrect Authorization[email protected]

Affected Products

ProductVersions
linuxfoundation nats-server
< 2.11.15
>= 2.12.0, < 2.12.6

CPE

  • cpe:2.3:a:linuxfoundation:nats-server:*:*:*:*:*:*:*:*

Remediation

  • No remediation found in references.

Change History

16 change records found show changes

QUICK INFO

CVE Dictionary Entry:
CVE-2026-33217
NVD Published Date:
Mar 25, 2026
NVD Last Modified:
Sep 9, 2026
Source:
[email protected]
CVE-2026-33217 Details - Not Deferred