Go/github.com/nats-io/nats-server/v2 CVE-2026-33219: medium 5.3, EPSS 0.55%
NATS is vulnerable to pre-auth DoS through WebSockets client service in github.com/nats-io/nats-server
Action: Upgrade github.com/nats-io/nats-server/v2 to 2.11.15 or later.
go get github.com/nats-io/nats-server/v2@v2.11.15go get github.com/nats-io/nats-server/v2@v2.12.6Affected
| introduced | fixed | last affected |
|---|---|---|
| 0 | 2.11.15 | - |
| 2.12.0-RC.1 | 2.12.6 | - |
Fixed versions
| 2.11.15 | 2.12.6 |
Sources
- osv: GO-2026-4831#Go/github.com/nats-io/nats-server/v2
- nvd: CVE-2026-33219
- https://github.com/nats-io/nats-server/security/advisories/GHSA-8r68-gvr4-jh7j
- https://advisories.nats.io/CVE/secnote-2026-02.txt
- https://advisories.nats.io/CVE/secnote-2026-11.txt
- https://github.com/advisories/GHSA-qrvq-68c2-7grw
CVE-2026-33219 · published · modified · JSON