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CVE-2026-33219 NATS is vulnerable to pre-auth DoS through WebSockets client service

🗓️ 25 Mar 2026 19:55:28Reported by GitHub_MType 
cvelist
 cvelist
🔗 www.cve.org👁 22 Views

NATS pre-auth WebSocket DoS causes unbounded memory usage; fixed in 2.11.15 and 2.12.6; disable WebSockets if unused.

Related
Affected
Refs
ReporterTitlePublishedViews
Family
ATTACKERKB
CVE-2026-33219
25 Mar 202619:55
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AlpineLinux
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25 Mar 202619:55
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25 Mar 202619:17
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Circl
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25 Mar 202619:16
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CNNVD
Nats-Server 安全漏洞
25 Mar 202600:00
cnnvd
CVE
CVE-2026-33219
25 Mar 202619:55
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Debian CVE
CVE-2026-33219
25 Mar 202619:55
debiancve
Github Security Blog
NATS is vulnerable to pre-auth DoS through WebSockets client service
24 Mar 202621:46
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NVD
CVE-2026-33219
25 Mar 202620:16
nvd
OSV
BIT-NATS-2026-33219 NATS is vulnerable to pre-auth DoS through WebSockets client service
27 Mar 202617:45
osv
Rows per page
[
  {
    "vendor": "nats-io",
    "product": "nats-server",
    "versions": [
      {
        "version": "< 2.11.15",
        "status": "affected"
      },
      {
        "version": ">= 2.12.0-RC.1, < 2.12.6",
        "status": "affected"
      }
    ]
  }
]

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