{"action":"Upgrade github.com/nats-io/nats-server/v2 to 2.11.15 or later.","affected":[{"fixed":"2.11.15","introduced":"0"},{"fixed":"2.12.6","introduced":"2.12.0-RC.1"}],"component":"github.com/nats-io/nats-server/v2","cve_ids":["CVE-2026-33219"],"ecosystem":"Go","epss":0.01039,"exploited":false,"fixed_versions":["2.11.15","2.12.6"],"ghsa_id":"GHSA-8r68-gvr4-jh7j","id":"tcs_01M5KF48DHEE5CM8V8Y3JNRT2W","modified_at":"2026-09-10T03:50:38.245297667Z","published_at":"2026-03-24T21:46:31Z","references":["https://osv.dev/vulnerability/GHSA-8r68-gvr4-jh7j","https://github.com/nats-io/nats-server/security/advisories/GHSA-8r68-gvr4-jh7j","https://nvd.nist.gov/vuln/detail/CVE-2026-33219","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","https://github.com/nats-io/nats-server"],"severity":{"label":"medium","score":5.3},"sources":[{"source":"osv","source_id":"GHSA-8r68-gvr4-jh7j","url":"https://osv.dev/vulnerability/GHSA-8r68-gvr4-jh7j"}],"summary":"NATS is vulnerable to pre-auth DoS through WebSockets client service"}