Improper Authentication Affecting nats-top package, versions <0.6.3-r18


Severity

Recommended
0.0
medium
0
10

Snyk's Security Team recommends NVD's CVSS assessment. Learn more

Threat Intelligence

EPSS
0.02% (7th percentile)

Do your applications use this vulnerable package?

In a few clicks we can analyze your entire application and see what components are vulnerable in your application, and suggest you quick fixes.

Test your applications

Snyk Learn

Learn about Improper Authentication vulnerabilities in an interactive lesson.

Start learning
  • Snyk IDSNYK-CHAINGUARDLATEST-NATSTOP-15809261
  • published29 Mar 2026
  • disclosed25 Mar 2026

Introduced: 25 Mar 2026

NewCVE-2026-33246  (opens in a new tab)
CWE-287  (opens in a new tab)
CWE-290  (opens in a new tab)

How to fix?

Upgrade Chainguard nats-top to version 0.6.3-r18 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream nats-top package and not the nats-top package as distributed by Chainguard. See How to fix? for Chainguard relevant fixed versions and status.

NATS-Server is a High-Performance server for NATS.io, a cloud and edge native messaging system. The nats-server offers a Nats-Request-Info: message header, providing information about a request. This is supposed to provide enough information to allow for account/user identification, such that NATS clients could make their own decisions on how to trust a message, provided that they trust the nats-server as a broker. A leafnode connecting to a nats-server is not fully trusted unless the system account is bridged too. Thus identity claims should not have propagated unchecked. Prior to versions 2.11.15 and 2.12.6, NATS clients relying upon the Nats-Request-Info: header could be spoofed. This does not directly affect the nats-server itself, but the CVSS Confidentiality and Integrity scores are based upon what a hypothetical client might choose to do with this NATS header. Versions 2.11.15 and 2.12.6 contain a fix. No known workarounds are available.

CVSS Base Scores

version 3.1