{"action":"Upgrade github.com/nats-io/nats-server/v2 to 2.11.14 or later.","affected":[{"fixed":"2.11.14","introduced":"2.2.0"},{"fixed":"2.12.5","introduced":"2.12.0"}],"component":"github.com/nats-io/nats-server/v2","cve_ids":["CVE-2026-27889"],"ecosystem":"Go","epss":0.00593,"exploited":false,"fixed_versions":["2.11.14","2.12.5"],"ghsa_id":"GHSA-pq2q-rcw4-3hr6","id":"tcs_01M5KFHPSHXQ0RB7AWHV6JWT9B","modified_at":"2026-09-10T03:50:40.301051379Z","published_at":"2026-03-25T17:07:51Z","references":["https://osv.dev/vulnerability/GHSA-pq2q-rcw4-3hr6","https://github.com/nats-io/nats-server/security/advisories/GHSA-pq2q-rcw4-3hr6","https://nvd.nist.gov/vuln/detail/CVE-2026-27889","https://advisories.nats.io/CVE/secnote-2026-03.txt","https://github.com/nats-io/nats-server"],"severity":{"label":"high","score":7.5},"sources":[{"source":"osv","source_id":"GHSA-pq2q-rcw4-3hr6","url":"https://osv.dev/vulnerability/GHSA-pq2q-rcw4-3hr6"}],"summary":"NATS: Pre-auth remote server crash via WebSocket frame length overflow in wsRead"}