CVE-2026-33218

HIGH

7.5

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, a client which can connect to the leafnode port can crash the nats-server with a certain malformed message pre-authentication. Versions 2.11.15 and 2.12.6 contain a fix. As a workaround, disable leafnode support if not needed or restrict network connections to the leafnode port, if plausible without compromising the service offered.

Details CVE

Score CVSS v3.17.5

SeveriteHIGH

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

Vecteur d'attaqueNETWORK

ComplexiteLOW

Privileges requisNONE

Interaction utilisateurNONE

Publie3/25/2026

Derniere modification3/26/2026

Sourcenvd

Observations honeypot0

Produits affectes

linuxfoundation:nats-server

Faiblesses (CWE)

CWE-20

References

https://advisories.nats.io/CVE/secnote-2026-10.txt(security-advisories@github.com)

https://github.com/nats-io/nats-server/security/advisories/GHSA-vprv-35vv-q339(security-advisories@github.com)

Correlations IOC

Aucune correlation enregistree

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