Goal Reached Thanks to every supporter — we hit 100%!

Goal: 1000 CNY · Raised: 1000 CNY

100.0%
Buy Us a Coffee

CVE-2026-33247— NATS credentials are exposed in monitoring port via command-line argv

CVSS 7.4 · High EPSS 0.01% · P2
Get alerts for future matching vulnerabilitiesLog in to subscribe

I. Basic Information for CVE-2026-33247

Vulnerability Information
Have questions about the vulnerability? See if Shenlong's analysis helps!
View Shenlong Deep Dive ↗

Although we use advanced large model technology, its output may still contain inaccurate or outdated information.Shenlong tries to ensure data accuracy, but please verify and judge based on the actual situation.

Vulnerability Title
NATS credentials are exposed in monitoring port via command-line argv
Source: NVD (National Vulnerability Database)
Vulnerability 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, if a nats-server is run with static credentials for all clients provided via argv (the command-line), then those credentials are visible to any user who can see the monitoring port, if that too is enabled. The `/debug/vars` end-point contains an unredacted copy of argv. Versions 2.11.15 and 2.12.6 contain a fix. As a workaround, configure credentials inside a configuration file instead of via argv, and do not enable the monitoring port if using secrets in argv. Best practice remains to not expose the monitoring port to the Internet, or to untrusted network sources.
Source: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N
Source: NVD (National Vulnerability Database)
Vulnerability Type
通过Debug信息导致的信息暴露
Source: NVD (National Vulnerability Database)
Vulnerability Title
Nats-Server 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Nats-Server是Nats开源的一个用于 Nats.io、云和边缘本机消息传递系统的高性能服务器。 NATS-Server 2.11.15之前版本和2.12.6之前版本存在安全漏洞，该漏洞源于通过命令行提供的凭据在监控端口可见，可能导致凭据泄露。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

VendorProductAffected VersionsCPESubscribe
nats-ionats-server < 2.11.15 -

II. Public POCs for CVE-2026-33247

#POC DescriptionSource LinkShenlong Link
AI-Generated POCPremium

No public POC found.

Login to generate AI POC

III. Intelligence Information for CVE-2026-33247

请登录查看更多情报信息。

Same Patch Batch · nats-io · 2026-03-25 · 12 CVEs total

CVE-2026-332168.6 HIGHNATS has MQTT plaintext password disclosure
CVE-2026-278897.5 HIGHNATS: Pre-auth remote server crash via WebSocket frame length overflow in wsRead
CVE-2026-297857.5 HIGHNATS Server panic via malicious compression on leafnode port
CVE-2026-332187.5 HIGHNATS has pre-auth server panic via leafnode handling
CVE-2026-332177.1 HIGHNATS allows MQTT clients to bypass ACL checks
CVE-2026-332466.4 MEDIUMNATS: Leafnode connections allow spoofing of Nats-Request-Info identity headers
CVE-2026-332236.4 MEDIUMNATS Server: Incomplete Stripping of Nats-Request-Info Header Allows Identity Spoofing
CVE-2026-332195.3 MEDIUMNATS is vulnerable to pre-auth DoS through WebSockets client service
CVE-2026-332224.9 MEDIUMNATS JetStream has an authorization bypass through its Management API
CVE-2026-332494.3 MEDIUMNATS: Message tracing can be redirected to arbitrary subject
CVE-2026-332484.2 MEDIUMNATS has mTLS verify_and_map authentication bypass via incorrect Subject DN matching

IV. Related Vulnerabilities

Same product: nats-server
Same vendor: nats-io
Same weakness: CWE-215

V. Comments for CVE-2026-33247

No comments yet

Leave a comment