CVE-2026-33216

HIGHNVD 7.57.5—
EchelonGraph scoreMEDIUM confidence

This high-severity CVE scores 7.5 under NVD CVSS v3. EPSS exploit probability: 0.4%, top 70% of all CVEs by exploit prediction. GitHub Security Advisory data not yet ingested — confidence will rise once GHSA publishes (typical lag: hours to days for open-source ecosystem CVEs; never for infrastructure-only CVEs).

Triggered by: NVD CVSS baseline
Sources: epss, nvd
7.5EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0.6%CVSS: 7.5Exploit: None knownExposed services: Not assessed

A fix is available — apply it.

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 v3
7.5
EG Score
7.5HIGHmedium confidence
EG Risk
49
EG Risk 49/100

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity75% × 45%
Exploitation0% × 40%
Automatability100% × 15%
EPSS PROB
0.6%
EPSS %ILE
48th
KEV
Not listed

Published

March 25, 2026

Last Modified

September 9, 2026

Advisory Details (9)

Auto-updated Jul 3, 2026
Patch available. Sources: github_commit, github, redhat.
redhatMentions a patch (unverified)
https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-33216.json
redhat

2451448 – (CVE-2026-33216) CVE-2026-33216 nats-server: github.com/nats-io/nats-server: NATS-Server: Information disclosure of MQTT passwords through monitoring endpoints

https://bugzilla.redhat.com/show_bug.cgi?id=2451448
redhatMentions a patch (unverified)

cve-details

https://access.redhat.com/security/cve/CVE-2026-33216
redhatMentions a patch (unverified)
https://access.redhat.com/errata/RHSA-2026:23345
redhatMentions a patch (unverified)
https://access.redhat.com/errata/RHSA-2026:22347
redhatMentions a patch (unverified)
https://access.redhat.com/errata/RHSA-2026:21769
githubMentions a patch (unverified)

MQTT plaintext password disclosure · Advisory · nats-io/nats-server · GitHub

https://github.com/nats-io/nats-server/security/advisories/GHSA-v722-jcv5-w7mc
github_commit

commit b5b63cfc35a5 (nats-io/nats-server)

Fix landed in nats-io/nats-server commit b5b63cfc35a5 — awaiting tagged release

https://github.com/nats-io/nats-server/commit/b5b63cfc35a57075e09c1f57503d31721bed8099
generic
https://advisories.nats.io/CVE/secnote-2026-05.txt

Vendor Advisories for CVE-2026-33216(4)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Patch Availability(3)

Vendor / EcosystemFix (by version range) / PatchReleasedSource
redhatmulticluster-globalhub/multicluster-globalhub-grafana-rhel9:17801671182026-06-04redhat
redhatmulticluster-globalhub/multicluster-globalhub-grafana-rhel9:17795794392026-06-01redhat
redhatmulticluster-globalhub/multicluster-globalhub-grafana-rhel9:17788677532026-05-28redhat

Patches are aggregated from vendor advisories (Red Hat, Microsoft, Cisco, GitHub) and package ecosystems (OSV, GHSA). Multiple rows for the same upstream release have been deduplicated.

Affected Packages

(5 across 4 ecosystems)
Go(2)
PackageVulnerable rangeFix by version rangeDependents
github.com/nats-io/nats-server—
  • every version on: no fix on record
—
github.com/nats-io/nats-server/v2—
  • every version up to 2.11.15: fixed in 2.11.15
  • 2.12.0-RC.1 up to 2.12.6: fixed in 2.12.6
—
Debian:12(1)
PackageVulnerable rangeFix by version rangeDependents
nats-server2.10.1-1 ... 2.9.19-1 (15 versions)
  • every version on: no fix on record
—
Debian:13(1)
PackageVulnerable rangeFix by version rangeDependents
nats-server2.10.27-1 ... 2.14.6-1 (6 versions)
  • every version on: no fix on record
—
Debian:14(1)
PackageVulnerable rangeFix by version rangeDependents
nats-server2.10.27-1, 2.12.4-1
  • every version up to 2.12.6-1: fixed in 2.12.6-1
—

Weakness Classification(2)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 7× in last 7d / 25× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

Showing the most recent 100 of 155 total refreshes for this CVE.

  1. 2026-10-09 20:07 UTCEPSS rescore
  2. 2026-10-08 17:12 UTCEPSS rescore
  3. 2026-10-07 23:47 UTCEPSS rescore
  4. 2026-10-06 15:17 UTCEPSS rescore
  5. 2026-10-05 17:42 UTCEPSS rescore
  6. 2026-10-04 23:22 UTCEPSS rescore
  7. 2026-10-03 14:25 UTCEPSS rescore
  8. 2026-10-01 19:49 UTCEPSS rescore
  9. 2026-09-30 15:03 UTCEPSS rescore
  10. 2026-09-29 07:15 UTCOSV refresh
  11. 2026-09-28 13:51 UTCEPSS rescore
  12. 2026-09-27 13:48 UTCEPSS rescore
  13. 2026-09-26 15:58 UTCEPSS rescore
  14. 2026-09-26 00:26 UTCEPSS rescore
  15. 2026-09-20 20:15 UTCEPSS rescore
  16. 2026-09-18 19:28 UTCEPSS rescore
  17. 2026-09-18 19:28 UTCEPSS rescore
  18. 2026-09-17 19:30 UTCEPSS rescore
  19. 2026-09-16 14:08 UTCEPSS rescore
  20. 2026-09-16 05:15 UTCEPSS rescore
  21. 2026-09-15 03:11 UTCEPSS rescore
  22. 2026-09-13 16:47 UTCEPSS rescore
  23. 2026-09-12 15:01 UTCEPSS rescore
  24. 2026-09-11 14:52 UTCEPSS rescore
  25. 2026-09-10 09:34 UTCEPSS rescore
Show 75 more
  1. 2026-09-09 13:42 UTCVendor advisory
  2. 2026-09-09 12:41 UTCEG score recompute
  3. 2026-09-09 12:41 UTCVendor advisory
  4. 2026-09-08 22:00 UTCEPSS rescore
  5. 2026-09-07 16:01 UTCEPSS rescore
  6. 2026-09-07 13:24 UTCEG score recompute
  7. 2026-09-07 13:24 UTCVendor advisory
  8. 2026-09-06 13:47 UTCEPSS rescore
  9. 2026-09-06 13:47 UTCEPSS rescore
  10. 2026-09-04 05:06 UTCEPSS rescore
  11. 2026-09-02 14:11 UTCEPSS rescore
  12. 2026-09-01 13:53 UTCEPSS rescore
  13. 2026-09-01 04:39 UTCEPSS rescore
  14. 2026-09-01 04:39 UTCEPSS rescore
  15. 2026-08-30 19:17 UTCEPSS rescore
  16. 2026-08-30 01:22 UTCEPSS rescore
  17. 2026-08-28 21:41 UTCEPSS rescore
  18. 2026-08-27 14:25 UTCEPSS rescore
  19. 2026-08-26 14:46 UTCEPSS rescore
  20. 2026-08-25 13:49 UTCEPSS rescore
  21. 2026-08-24 14:17 UTCEPSS rescore
  22. 2026-08-24 13:31 UTCVendor advisory
  23. 2026-08-24 12:27 UTCEG score recompute
  24. 2026-08-24 12:27 UTCVendor advisory
  25. 2026-08-23 00:19 UTCEPSS rescore
  26. 2026-08-21 23:49 UTCEPSS rescore
  27. 2026-08-20 22:55 UTCEPSS rescore
  28. 2026-08-20 22:55 UTCEPSS rescore
  29. 2026-08-19 17:03 UTCEPSS rescore
  30. 2026-08-18 13:48 UTCEPSS rescore
  31. 2026-08-17 13:47 UTCEPSS rescore
  32. 2026-08-17 12:21 UTCVendor advisory
  33. 2026-08-17 12:13 UTCEG score recompute
  34. 2026-08-17 12:13 UTCVendor advisory
  35. 2026-08-16 14:56 UTCEPSS rescore
  36. 2026-08-16 10:13 UTCEG score recompute
  37. 2026-08-16 10:13 UTCVendor advisory
  38. 2026-08-16 02:14 UTCEPSS rescore
  39. 2026-08-15 01:30 UTCEPSS rescore
  40. 2026-08-14 13:28 UTCVendor advisory
  41. 2026-08-14 12:30 UTCVendor advisory
  42. 2026-08-14 06:31 UTCEG score recompute
  43. 2026-08-14 06:31 UTCVendor advisory
  44. 2026-08-13 22:00 UTCEPSS rescore
  45. 2026-08-12 20:48 UTCEG score recompute
  46. 2026-08-12 20:48 UTCVendor advisory
  47. 2026-08-12 13:50 UTCEPSS rescore
  48. 2026-08-11 20:52 UTCEG score recompute
  49. 2026-08-11 20:52 UTCVendor advisory
  50. 2026-08-11 03:55 UTCEG score recompute
  51. 2026-08-11 03:55 UTCVendor advisory
  52. 2026-08-11 00:00 UTCEPSS rescore
  53. 2026-08-10 13:22 UTCVendor advisory
  54. 2026-08-10 12:27 UTCVendor advisory
  55. 2026-08-10 07:54 UTCVendor advisory
  56. 2026-08-09 19:00 UTCEG score recompute
  57. 2026-08-09 19:00 UTCVendor advisory
  58. 2026-08-09 13:46 UTCEPSS rescore
  59. 2026-08-09 06:07 UTCEG score recompute
  60. 2026-08-09 06:07 UTCVendor advisory
  61. 2026-08-08 16:37 UTCEPSS rescore
  62. 2026-08-08 05:20 UTCEG score recompute
  63. 2026-08-08 05:20 UTCVendor advisory
  64. 2026-08-07 16:27 UTCVendor advisory
  65. 2026-08-06 18:50 UTCEG score recompute
  66. 2026-08-06 18:50 UTCVendor advisory
  67. 2026-08-06 13:46 UTCEPSS rescore
  68. 2026-08-06 00:57 UTCEG score recompute
  69. 2026-08-06 00:57 UTCVendor advisory
  70. 2026-08-05 19:17 UTCEPSS rescore
  71. 2026-08-04 15:10 UTCEPSS rescore
  72. 2026-08-04 10:38 UTCEPSS rescore
  73. 2026-08-04 02:39 UTCVendor advisory
  74. 2026-08-03 13:44 UTCVendor advisory
  75. 2026-08-03 12:49 UTCEG score recompute

Related CVEs(same product + same vendor + same CWE)

Frequently asked(5)

What is CVE-2026-33216?
CVE-2026-33216 is a high vulnerability published on March 25, 2026. 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…
When was CVE-2026-33216 disclosed?
CVE-2026-33216 was first published on March 25, 2026, with the most recent update on September 9, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-33216 actively exploited?
CVE-2026-33216 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.6% probability of exploitation in the next 30 days (48th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-33216?
CVE-2026-33216 has a CVSS v3 base score of 7.5 (NVD).
How do I remediate CVE-2026-33216?
A fix for CVE-2026-33216 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-33216 are linked in the Vendor Advisories panel on this page.

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