cve.bz

CVE-2026-33216

7.5 highEPSS 0.4%

High (7.5) in linuxfoundation nats-server. EPSS 0.4% chance of exploitation in the next 30 days. Fixed in github.com/nats-io/nats-server/v2 2.11.15, 2.12.6.

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, for MQTT deployments using usercodes/passwords: MQTT passwords are incorrectly classified as a non-authenticating identity statement (JWT) and exposed via monitoring endpoints. Versions 2.11.14 and 2.12.6 contain a fix. As a workaround, ensure monitoring end-points are adequately secured. Best practice remains to not expose the monitoring endpoint to the Internet or other untrusted network users.

Severity

CVSS 3.1

7.5 high
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
EPSS
0.4% chance of exploitation in the next 30 days; higher than 31% of CVEs (scores of 2026-10-31)
CWEs
CWE-256, CWE-213
Published
Modified
Record from
the NVD, synced

Affected

Packages (OSV)

AdvisoryEcosystemPackageAffectedFixed in
GHSA-v722-jcv5-w7mcGogithub.com/nats-io/nats-server/v2<2.11.152.11.15
GHSA-v722-jcv5-w7mcGogithub.com/nats-io/nats-server/v2>=2.12.0-RC.1 <2.12.62.12.6
GHSA-v722-jcv5-w7mcGogithub.com/nats-io/nats-serverall versionsno fix published
GO-2026-4836Gogithub.com/nats-io/nats-serverall versionsno fix published
GO-2026-4836Gogithub.com/nats-io/nats-server/v2<2.11.15
>=2.12.0-RC.1 <2.12.6		2.11.15, 2.12.6

References

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