{"action":"No fix published. Pin and monitor.","affected":[{"introduced":"0"}],"component":"github.com/nats-io/nats-server","cve_ids":["CVE-2026-27889"],"ecosystem":"Go","epss":0.00593,"exploited":false,"fixed_versions":[],"ghsa_id":"GHSA-pq2q-rcw4-3hr6","id":"tcs_01M5KGGF91EN4N0EVRYEQE1DAT","modified_at":"2026-03-27T14:14:21.538339Z","published_at":"2026-03-26T20:33:05Z","references":["https://osv.dev/vulnerability/GO-2026-4841","https://github.com/nats-io/nats-server/security/advisories/GHSA-pq2q-rcw4-3hr6","https://advisories.nats.io/CVE/secnote-2026-03.txt"],"severity":{"label":"high","score":7.5},"sources":[{"source":"osv","source_id":"GO-2026-4841","url":"https://osv.dev/vulnerability/GO-2026-4841"},{"source":"nvd","source_id":"CVE-2026-27889","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-27889"}],"summary":"NATS: Pre-auth remote server crash via WebSocket frame length overflow in wsRead in github.com/nats-io/nats-server"}