{"cve":"CVE-2026-33216","nvd":{"published":"2026-03-25T20:16:32.320","modified":"2026-09-09T13:19:22.887","status":"Modified","description":"NATS-Server is a High-Performance server for NATS.io, a cloud and edge native messaging system. Prior to versions 2.11.15 and 2.12.6, for MQTT deployments using usercodes/passwords: MQTT passwords are incorrectly classified as a non-authenticating identity statement (JWT) and exposed via monitoring endpoints. Versions 2.11.14 and 2.12.6 contain a fix. As a workaround, ensure monitoring end-points are adequately secured. Best practice remains to not expose the monitoring endpoint to the Internet or other untrusted network users.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N","score":7.5},"cwes":["CWE-256","CWE-213"],"references":["https://advisories.nats.io/CVE/secnote-2026-05.txt","https://github.com/nats-io/nats-server/commit/b5b63cfc35a57075e09c1f57503d31721bed8099","https://github.com/nats-io/nats-server/security/advisories/GHSA-v722-jcv5-w7mc","https://access.redhat.com/errata/RHSA-2026:21769","https://access.redhat.com/errata/RHSA-2026:22347"],"products":["linuxfoundation:nats-server"],"source":"nvd","synced_at":"2026-10-19T22:28:18.033120106+00:00"},"epss":{"cve":"CVE-2026-33216","score":0.00372,"percentile":0.31137,"date":"2026-10-31"},"kev":null,"osv":[{"id":"GHSA-v722-jcv5-w7mc","url":"https://osv.dev/vulnerability/GHSA-v722-jcv5-w7mc","summary":"NATS has MQTT plaintext password disclosure","modified":"2026-09-10T03:50:41.122886353Z","packages":[{"ecosystem":"Go","name":"github.com/nats-io/nats-server/v2","purl":"pkg:golang/github.com/nats-io/nats-server/v2","ranges":["<2.11.15"],"fixed":["2.11.15"]},{"ecosystem":"Go","name":"github.com/nats-io/nats-server/v2","purl":"pkg:golang/github.com/nats-io/nats-server/v2","ranges":[">=2.12.0-RC.1 <2.12.6"],"fixed":["2.12.6"]},{"ecosystem":"Go","name":"github.com/nats-io/nats-server","purl":"pkg:golang/github.com/nats-io/nats-server","ranges":["all versions"],"fixed":[]}]},{"id":"GO-2026-4836","url":"https://osv.dev/vulnerability/GO-2026-4836","summary":"NATS has MQTT plaintext password disclosure in github.com/nats-io/nats-server","modified":"2026-03-27T18:26:13.543315Z","packages":[{"ecosystem":"Go","name":"github.com/nats-io/nats-server","purl":"pkg:golang/github.com/nats-io/nats-server","ranges":["all versions"],"fixed":[]},{"ecosystem":"Go","name":"github.com/nats-io/nats-server/v2","purl":"pkg:golang/github.com/nats-io/nats-server/v2","ranges":["<2.11.15",">=2.12.0-RC.1 <2.12.6"],"fixed":["2.11.15","2.12.6"]}]}],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}