Allocation of Resources Without Limits or Throttling Affecting nats-top-fips package, versions <0.6.3-r16


Severity

Recommended
low

Based on default assessment until relevant scores are available.

Threat Intelligence

EPSS
0.53% (41st percentile)

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  • Snyk IDSNYK-CHAINGUARDLATEST-NATSTOPFIPS-15809246
  • published29 Mar 2026
  • disclosed25 Mar 2026

Introduced: 25 Mar 2026

CVE-2026-33219  (opens in a new tab)
CWE-770  (opens in a new tab)

How to fix?

Upgrade Chainguard nats-top-fips to version 0.6.3-r16 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream nats-top-fips package and not the nats-top-fips 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. Prior to versions 2.11.15 and 2.12.6, a malicious client which can connect to the WebSockets port can cause unbounded memory use in the nats-server before authentication; this requires sending a corresponding amount of data. This is a milder variant of CVE-2026-27571. That earlier issue was a compression bomb, this vulnerability is not. Attacks against this new issue thus require significant client bandwidth. Versions 2.11.15 and 2.12.6 contain a fix. As a workaround, disable websockets if not required for project deployment.

CVSS Base Scores

version 3.1