Detections
Analytics

Echo: github.com/nats-io/nats-server/v2: security update to 2.11.14

high Tenable Cloud Security Plugin ID 464194

Description

There are packages installed that are affected by a vulnerability referenced in the following CVE:

 - NATS-Server is a High-Performance server for NATS.io, a cloud and edge native messaging system. Starting
 in version 2.2.0 and prior to versions 2.11.14 and 2.12.5, a missing sanity check on a WebSockets frame
 could trigger a server panic in the nats-server. This happens before authentication, and so is exposed to
 anyone who can connect to the websockets port. Versions 2.11.14 and 2.12.5 contains a fix. A workaround is
 available. The vulnerability only affects deployments which use WebSockets and which expose the network
 port to untrusted end-points. If one is able to do so, a defense in depth of restricting either of these
 will mitigate the attack. (CVE-2026-27889)

Solution

Update the github.com/nats-io/nats-server/v2 library and its related packages to version 2.11.14 or later.

See Also

https://advisory.echohq.com/cve/CVE-2026-27889

Plugin Details

Severity: High

ID: 464194

Version: Revision 1.1

Type: Local

Published: 10/2/2026

Updated: 10/3/2026

Supported Sensors: Tenable Cloud Security, Tenable Self-Hosted Container Security

Risk Information

VPR

Risk Factor: Low

Score: 3

Percentile: 23.72

CVSS v2

Risk Factor: High

Base Score: 7.8

Temporal Score: 5.8

Vector: CVSS2#AV:N/AC:L/Au:N/C:N/I:N/A:C

CVSS Score Source: CVE-2026-27889

CVSS v3

Risk Factor: High

Base Score: 7.5

Temporal Score: 6.5

Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Temporal Vector: CVSS:3.0/E:U/RL:O/RC:C

Vulnerability Information

Exploit Ease: No known exploits are available

Patch Publication Date: 9/28/2026

Vulnerability Publication Date: 3/25/2026

Reference Information

CVE: CVE-2026-27889