GHSA-x6g4-f6q3-fqvv

Suggest an improvement
Source
https://github.com/advisories/GHSA-x6g4-f6q3-fqvv
Import Source
https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/03/GHSA-x6g4-f6q3-fqvv/GHSA-x6g4-f6q3-fqvv.json
JSON Data
https://api.osv.dev/v1/vulns/GHSA-x6g4-f6q3-fqvv
Aliases
Downstream
Related
Published
2026-03-24T20:44:00Z
Modified
2026-03-27T21:03:57.521742Z
Severity
  • 7.4 (High) CVSS_V3 - CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N CVSS Calculator
Summary
NATS credentials are exposed in monitoring port via command-line argv
Details

Background

NATS.io is a high performance open source pub-sub distributed communication technology, built for the cloud, on-premise, IoT, and edge computing.

The nats-server provides an optional monitoring port, which provides access to sensitive data. The nats-server can take certain configuration options on the command-line instead of requiring a configuration file.

Problem Description

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.

Patches

Fixed in nats-server 2.12.6 & 2.11.15

Workarounds

The NATS Maintainers are bemused at the concept of someone deploying a real configuration using --pass to avoid a config file, but also enabling monitoring.

Configure credentials inside a configuration file instead of via argv.

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.

Database specific 
{
    "github_reviewed_at": "2026-03-24T20:44:00Z",
    "nvd_published_at": "2026-03-25T20:16:33Z",
    "cwe_ids": [
        "CWE-215"
    ],
    "severity": "HIGH",
    "github_reviewed": true
}
References

Affected packages

Go / github.com/nats-io/nats-server/v2

Package

Name
github.com/nats-io/nats-server/v2
View open source insights on deps.dev
Purl
pkg:golang/github.com/nats-io/nats-server/v2

Affected ranges

Type
SEMVER
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
2.11.15

Database specific

source 
"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/03/GHSA-x6g4-f6q3-fqvv/GHSA-x6g4-f6q3-fqvv.json"

Go / github.com/nats-io/nats-server/v2

Package

Name
github.com/nats-io/nats-server/v2
View open source insights on deps.dev
Purl
pkg:golang/github.com/nats-io/nats-server/v2

Affected ranges

Type
SEMVER
Events
Introduced
2.12.0-RC.1
Fixed
2.12.6

Database specific

source 
"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/03/GHSA-x6g4-f6q3-fqvv/GHSA-x6g4-f6q3-fqvv.json"