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CVE-2026-33218NATS has pre-auth server panic via leafnode handling
Descripción
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.
Datos: CVE.org, NVD, CISA KEV, FIRST EPSS, Ubuntu. Se publican tal como los indican las fuentes, en inglés.
Productos y versiones afectados
| Fabricante | Producto | Versiones | |
|---|---|---|---|
| linuxfoundation | nats-server | < 2.11.15 | |
| multicluster globalhub | 1.4 | — | |
| multicluster globalhub | 1.5 | — | |
| multicluster globalhub | 1.6 | — | |
| nats-io | nats-server | < < 2.11.15, >= 2.12.0-RC.1, < 2.12.6 | |
| Red Hat | Multicluster Global Hub 1.4.5 | all versions | |
| Red Hat | Multicluster Global Hub 1.6.5 | all versions | |
| Red Hat | Red Hat multicluster global hub 1.5.3 | all versions | |
| Red Hat | Red Hat OpenShift Container Platform 4 | — |
Referencias y parches
- https://github.com/nats-io/nats-server/security/advisories/GHSA-vprv-35vv-q339 MitigationVendor Advisory
- https://advisories.nats.io/CVE/secnote-2026-10.txt MitigationVendor Advisory
- https://access.redhat.com/errata/RHSA-2026:21769
- https://access.redhat.com/errata/RHSA-2026:22347
- https://access.redhat.com/errata/RHSA-2026:23345
- https://access.redhat.com/security/cve/CVE-2026-33218
- https://bugzilla.redhat.com/show_bug.cgi?id=2451450
- https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-33218.json
Coincidencias CPE (NVD) (2)
cpe:2.3:a:linuxfoundation:nats-server:*:*:*:*:*:*:*:*< 2.11.15cpe:2.3:a:linuxfoundation:nats-server:*:*:*:*:*:*:*:*≥ 2.12.0 < 2.12.6