VulnSocial

CVE-2026-33217Disclosure(linuxfoundation / nats-server)

LOWCVSS 6.5 · MEDIUM

Signal is active with 1 mentions in latest observed window

Immediate actions

  • Patch linuxfoundation nats-server systems immediately

Recommended action window: Monitor and triage in normal cycle

NVD 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.

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0.5/ 10 priority

Sources & remediation

Vendor / third-party advisories
Other references
Weakness type (CWE)
CWE-863CWE-425

Priority

LOW

Exploitation

NONE

PoC

NONE

Patch

AVAILABLE

Momentum

NONE

Are you affected?

If you run products in this scope, you should treat this CVE as relevant to your environment.

  • nats-server

Threat summary

  • Patch or workaround signal is available
  • 1 mentions across 1 observed day

What's happening

  • Patch or workaround mentioned in 1 signal
  • Technical details provided in 1 signal
  • Disclosure: 1 classified signal
  • 1 total mentions across 1 day

Affected systems

Vendors
linuxfoundation
Products
nats-server

Deep dive

Activity timeline1 mentions / 1d
00111Mentions · 2026-03-25: 1Patch / Workaround · 2026-03-25: 1Technical Details · 2026-03-25: 103-25
Signal classification1 categories
Disclosure
1100.0%
Referenced assets2 URLs
By indicator
Full discourse1 post
  • CVE@CVEnew
    Disclosure

    CVE-2026-33217 NATS-Server is a High-Performance server for http://NATS.io, a cloud and edge native messaging system. Prior to versions 2.11.15 and 2.12.6, when using ACLs on message subje… https://www.cve.org/CVERecord?id=CVE-2026-33217

    Post summary

    The text announces CVE-2026-33217, describing that NATS-Server versions prior to 2.11.15/2.12.6 are affected when using ACLs on message subjects, and indicates those newer versions serve as the patch.

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    56.8K followersView on X
CPE platform detail1 entries

1 of 1 entries

PartVendorProductVersionTarget SWTarget HW
Applinuxfoundationnats-server---

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