{"schema_version":"1.3.1","id":"GO-2026-4841","modified":"2026-03-26T20:33:05Z","published":"2026-03-26T20:33:05Z","aliases":["CVE-2026-27889","GHSA-pq2q-rcw4-3hr6"],"summary":"NATS: Pre-auth remote server crash via WebSocket frame length overflow in wsRead in github.com/nats-io/nats-server","details":"NATS: Pre-auth remote server crash via WebSocket frame length overflow in wsRead in github.com/nats-io/nats-server","affected":[{"package":{"name":"github.com/nats-io/nats-server","ecosystem":"Go"},"ranges":[{"type":"SEMVER","events":[{"introduced":"0"}]}],"ecosystem_specific":{}},{"package":{"name":"github.com/nats-io/nats-server/v2","ecosystem":"Go"},"ranges":[{"type":"SEMVER","events":[{"introduced":"2.2.0"},{"fixed":"2.11.14"},{"introduced":"2.12.0"},{"fixed":"2.12.5"}]}],"ecosystem_specific":{}}],"references":[{"type":"ADVISORY","url":"https://github.com/nats-io/nats-server/security/advisories/GHSA-pq2q-rcw4-3hr6"},{"type":"WEB","url":"https://advisories.nats.io/CVE/secnote-2026-03.txt"}],"database_specific":{"url":"https://pkg.go.dev/vuln/GO-2026-4841","review_status":"UNREVIEWED"}}