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Linux Distros Unpatched Vulnerability : CVE-2026-42535

critical Nessus Plugin ID 319906

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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.

 - A path handling issue in mod_dav_fs in Apache 2.4.67 and earlier allows a WebDAV content author to directly manipulate trusted DAV property databases, potentially causing child process crashes. Users are recommended to upgrade to version 2.4.68, which fixes this issue. (CVE-2026-42535)

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-2026-42535

https://ubuntu.com/security/CVE-2026-42535

Plugin Details

Severity: Critical

ID: 319906

File Name: unpatched_CVE_2026_42535.nasl

Version: 1.10

Type: Local

Agent: unix

Family: Misc.

Published: 6/9/2026

Updated: 7/16/2026

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

Risk Information

VPR

Risk Factor: Medium

Score: 4.3

Percentile: 53.64

CVSS v2

Risk Factor: Low

Base Score: 2.1

Temporal Score: 1.8

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

CVSS Score Source: CVE-2026-42535

CVSS v3

Risk Factor: Critical

Base Score: 9.1

Temporal Score: 8.3

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

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

Vulnerability Information

CPE: cpe:/o:canonical:ubuntu_linux:20.04:-:lts, p-cpe:/a:redhat:enterprise_linux:httpd-filesystem, p-cpe:/a:redhat:enterprise_linux:mod_http2, p-cpe:/a:redhat:enterprise_linux:httpd-tools, p-cpe:/a:redhat:enterprise_linux:mod_md, p-cpe:/a:centos:centos:httpd-tools, p-cpe:/a:centos:centos:mod_session, p-cpe:/a:centos:centos:httpd-core, p-cpe:/a:centos:centos:httpd-devel, p-cpe:/a:redhat:enterprise_linux:mod_lua, p-cpe:/a:redhat:enterprise_linux:mod_ldap, cpe:/o:canonical:ubuntu_linux:25.10, cpe:/o:redhat:enterprise_linux:9, cpe:/o:canonical:ubuntu_linux:18.04:-:lts, p-cpe:/a:redhat:enterprise_linux:httpd-manual, cpe:/o:centos:centos:8, p-cpe:/a:centos:centos:httpd-manual, cpe:/o:redhat:enterprise_linux:8, p-cpe:/a:centos:centos:mod_proxy_html, cpe:/o:canonical:ubuntu_linux:14.04:-:lts, p-cpe:/a:redhat:enterprise_linux:httpd-devel, p-cpe:/a:redhat:enterprise_linux:mod_ssl, p-cpe:/a:centos:centos:mod_md, p-cpe:/a:canonical:ubuntu_linux:apache2, p-cpe:/a:redhat:enterprise_linux:mod_session, p-cpe:/a:centos:centos:mod_http2, p-cpe:/a:centos:centos:mod_ssl, p-cpe:/a:redhat:enterprise_linux:mod_proxy_html, p-cpe:/a:redhat:enterprise_linux:httpd, p-cpe:/a:centos:centos:httpd-filesystem, cpe:/o:canonical:ubuntu_linux:16.04:-:lts, p-cpe:/a:centos:centos:httpd, p-cpe:/a:centos:centos:mod_ldap, p-cpe:/a:centos:centos:mod_lua, p-cpe:/a:redhat:enterprise_linux:httpd-core

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: 6/8/2026

Reference Information

CVE: CVE-2026-42535