Detections
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Linux Distros Unpatched Vulnerability : CVE-2026-84890

medium Nessus Plugin ID 342932

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.

 - undici's decompress interceptor decompresses response bodies according to the untrusted Content-Encoding header. While the number of content-encoding layers is capped, the total decompressed output size is unbounded and there is no configuration option to limit it. A malicious or faulty upstream can therefore return a small compressed payload, a compression bomb, that expands to hundreds of megabytes or more in client memory, an asymmetric resource consumption that can exhaust memory and crash the process. This affects undici versions from 7.15.0 up to 7.29.1 and from 8.0.0 up to 8.10.2. Users should upgrade to undici 7.29.1 or 8.10.2. (CVE-2026-84890)

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

Solution

There is no known solution at this time.

See Also

https://access.redhat.com/security/cve/cve-2026-84890

Plugin Details

Severity: Medium

ID: 342932

File Name: unpatched_CVE_2026_84890.nasl

Version: 1.1

Type: Local

Agent: unix

Family: Misc.

Published: 9/4/2026

Updated: 9/4/2026

Supported Sensors: Frictionless Assessment AWS, Frictionless Assessment Azure, Frictionless Assessment Agent, Nessus Agent, Agentless Assessment, Tenable Cloud Security, Tenable Self-Hosted Container Security, Nessus

Risk Information

VPR

Risk Factor: Low

Score: 3

Percentile: 23.63

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-2026-84890

CVSS v3

Risk Factor: Medium

Base Score: 5.9

Temporal Score: 5.4

Vector: CVSS:3.0/AV:N/AC:H/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: cpe:/o:centos:centos:8, cpe:/o:redhat:enterprise_linux:10, cpe:/o:redhat:enterprise_linux:8, cpe:/o:redhat:enterprise_linux:9, p-cpe:/a:centos:centos:grafana-selinux, p-cpe:/a:centos:centos:grafana, p-cpe:/a:centos:centos:nodejs-devel, p-cpe:/a:centos:centos:nodejs-docs, p-cpe:/a:centos:centos:nodejs-full-i18n, p-cpe:/a:centos:centos:nodejs-libs, p-cpe:/a:centos:centos:nodejs-nodemon, p-cpe:/a:centos:centos:nodejs-npm, p-cpe:/a:centos:centos:nodejs-packaging-bundler, p-cpe:/a:centos:centos:nodejs-packaging, p-cpe:/a:centos:centos:nodejs22, p-cpe:/a:centos:centos:nodejs24-devel, p-cpe:/a:centos:centos:nodejs24-docs, p-cpe:/a:centos:centos:nodejs24-full-i18n, p-cpe:/a:centos:centos:nodejs24-libs, p-cpe:/a:centos:centos:nodejs24-npm, p-cpe:/a:centos:centos:nodejs24, p-cpe:/a:centos:centos:nodejs26, p-cpe:/a:centos:centos:nodejs, p-cpe:/a:centos:centos:npm, p-cpe:/a:centos:centos:v8-12.4-devel, p-cpe:/a:centos:centos:v8-13.6-devel, p-cpe:/a:redhat:enterprise_linux:grafana-selinux, p-cpe:/a:redhat:enterprise_linux:grafana, p-cpe:/a:redhat:enterprise_linux:nodejs-devel, p-cpe:/a:redhat:enterprise_linux:nodejs-docs, p-cpe:/a:redhat:enterprise_linux:nodejs-full-i18n, p-cpe:/a:redhat:enterprise_linux:nodejs-libs, p-cpe:/a:redhat:enterprise_linux:nodejs-nodemon, p-cpe:/a:redhat:enterprise_linux:nodejs-npm, p-cpe:/a:redhat:enterprise_linux:nodejs-packaging-bundler, p-cpe:/a:redhat:enterprise_linux:nodejs-packaging, p-cpe:/a:redhat:enterprise_linux:nodejs22, p-cpe:/a:redhat:enterprise_linux:nodejs24-devel, p-cpe:/a:redhat:enterprise_linux:nodejs24-docs, p-cpe:/a:redhat:enterprise_linux:nodejs24-full-i18n, p-cpe:/a:redhat:enterprise_linux:nodejs24-libs, p-cpe:/a:redhat:enterprise_linux:nodejs24-npm, p-cpe:/a:redhat:enterprise_linux:nodejs24, p-cpe:/a:redhat:enterprise_linux:nodejs26, p-cpe:/a:redhat:enterprise_linux:nodejs, p-cpe:/a:redhat:enterprise_linux:npm, p-cpe:/a:redhat:enterprise_linux:v8-12.4-devel, p-cpe:/a:redhat:enterprise_linux:v8-13.6-devel

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

Exploit Ease: No known exploits are available

Vulnerability Publication Date: 9/4/2026

Reference Information

CVE: CVE-2026-84890