CVE-2026-33247

March 26, 2026, 5:17 p.m.

7.4
High

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.

Product(s) Impacted

Vendor Product Versions
Linuxfoundation
  • Nats-server
  • *

Weaknesses

Common security weaknesses mapped to this vulnerability.

CWE-215
Insertion of Sensitive Information Into Debugging Code
The product inserts sensitive information into debugging code, which could expose this information if the debugging code is not disabled in production.

*CPE(s)

Affected systems and software identified for this CVE.

Type Vendor Product Version Update Edition Language Software Edition Target Software Target Hardware Other Information
a linuxfoundation nats-server / / / / / / / /
a linuxfoundation nats-server / / / / / / / /

References

https://advisories.nats.io/CVE/secnote-2026-14.txt
https://github.com/nats-io/nats-server/security/advisories/GHSA-x6g4-f6q3-fqvv

Tags

[email protected]
CWE-215
2026-03-25
CVE-2026-33247

CVSS Score

7.4 / 10

CVSS Data - 3.1

  • Attack Vector: NETWORK
  • Attack Complexity: HIGH
  • Privileges Required: NONE
  • Scope: UNCHANGED
  • Confidentiality Impact: HIGH
  • Integrity Impact: HIGH
  • Availability Impact: NONE

    • CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N

    View Vector String

Timeline

Published: March 25, 2026, 8:16 p.m.
Last Modified: March 26, 2026, 5:17 p.m.

Status : Analyzed

CVE has been recently published to the CVE List and has been received by the NVD.

More info

Source

[email protected]

*Disclaimer: Some vulnerabilities do not have an associated CPE. To enhance the data, we use AI to infer CPEs based on CVE details. This is an automated process and might not always be accurate.