Linux Distros Unpatched Vulnerability : CVE-2026-12151

high Nessus Plugin ID 321561

Synopsis

The Linux/Unix host has one or more packages installed with a vulnerability that the vendor indicates will not be patched.

Description

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available.

- Impact: The undici WebSocket client enforces maxPayloadSize on the cumulative byte count of fragments in a message but does not enforce a limit on the number of fragments. A malicious WebSocket server can stream many small or empty continuation frames that each pass per-frame and cumulative-size validation, collectively causing unbounded memory growth in the client process. The result is memory exhaustion and a denial of service. Affected applications are those using the undici WebSocket client (new WebSocket(...)) or the WebSocketStream API that can be induced to connect to an attacker-controlled or compromised WebSocket endpoint. All releases starting at undici 6.17.0 are affected. Patches: Upgrade to undici >= 6.26.0, >= 7.28.0, or >= 8.5.0. Workarounds: No workaround is available. The fix must be applied through an upgrade. (CVE-2026-12151)

Note that Nessus relies on the presence of the package as reported by the vendor.

Solution

There is no known solution at this time.

Plugin Details

Severity: High

ID: 321561

File Name: unpatched_CVE_2026_12151.nasl

Version: 1.1

Type: Local

Agent: unix

Family: Misc.

Published: 6/20/2026

Updated: 6/20/2026

Supported Sensors: Nessus Agent, Nessus

Risk Information

VPR

Risk Factor: Low

Score: 3.6

CVSS v2

Risk Factor: Medium

Base Score: 5

Temporal Score: 4.3

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

CVSS Score Source: CVE-2026-12151

CVSS v3

Risk Factor: High

Base Score: 7.5

Temporal Score: 6.9

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:U/RC:C

Vulnerability Information

CPE: p-cpe:/a:redhat:enterprise_linux:nodejs-docs, cpe:/o:canonical:ubuntu_linux:26.04:-:lts, p-cpe:/a:centos:centos:nodejs-nodemon, p-cpe:/a:redhat:enterprise_linux:nodejs, p-cpe:/a:redhat:enterprise_linux:nodejs-libs, p-cpe:/a:redhat:enterprise_linux:nodejs24-libs, p-cpe:/a:centos:centos:nodejs22, p-cpe:/a:redhat:enterprise_linux:npm, p-cpe:/a:centos:centos:nodejs24-docs, p-cpe:/a:centos:centos:nodejs24-libs, p-cpe:/a:redhat:enterprise_linux:nodejs-devel, cpe:/o:debian:debian_linux:14.0, p-cpe:/a:centos:centos:nodejs-docs, p-cpe:/a:centos:centos:nodejs-libs, p-cpe:/a:centos:centos:nodejs24-devel, p-cpe:/a:canonical:ubuntu_linux:node-undici, p-cpe:/a:debian:debian_linux:node-undici, cpe:/o:canonical:ubuntu_linux:24.04:-:lts, p-cpe:/a:centos:centos:nodejs-devel, p-cpe:/a:redhat:enterprise_linux:nodejs24-full-i18n, p-cpe:/a:centos:centos:nodejs24, p-cpe:/a:redhat:enterprise_linux:nodejs24, p-cpe:/a:redhat:enterprise_linux:nodejs-full-i18n, p-cpe:/a:redhat:enterprise_linux:nodejs22, cpe:/o:debian:debian_linux:12.0, p-cpe:/a:redhat:enterprise_linux:nodejs-packaging-bundler, p-cpe:/a:redhat:enterprise_linux:nodejs24-devel, p-cpe:/a:centos:centos:nodejs, cpe:/o:canonical:ubuntu_linux:25.10, cpe:/o:redhat:enterprise_linux:9, p-cpe:/a:centos:centos:nodejs-full-i18n, p-cpe:/a:centos:centos:v8-13.6-devel, p-cpe:/a:centos:centos:npm, p-cpe:/a:centos:centos:nodejs-npm, p-cpe:/a:centos:centos:v8-12.4-devel, cpe:/o:centos:centos:8, p-cpe:/a:redhat:enterprise_linux:nodejs-packaging, p-cpe:/a:redhat:enterprise_linux:v8-13.6-devel, p-cpe:/a:centos:centos:nodejs-packaging-bundler, cpe:/o:redhat:enterprise_linux:8, cpe:/o:debian:debian_linux:13.0, cpe:/o:redhat:enterprise_linux:10, p-cpe:/a:redhat:enterprise_linux:nodejs24-npm, p-cpe:/a:redhat:enterprise_linux:nodejs24-docs, p-cpe:/a:redhat:enterprise_linux:nodejs-npm, p-cpe:/a:redhat:enterprise_linux:v8-12.4-devel, p-cpe:/a:centos:centos:nodejs-packaging, p-cpe:/a:centos:centos:nodejs24-full-i18n, p-cpe:/a:redhat:enterprise_linux:nodejs-nodemon, p-cpe:/a:centos:centos:nodejs24-npm

Required KB Items: Host/cpu, Host/local_checks_enabled, global_settings/vendor_unpatched, Host/OS/identifier

Exploit Ease: No known exploits are available

Vulnerability Publication Date: 6/17/2026

Reference Information

CVE: CVE-2026-12151

Detections

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