Detections
Analytics

Linux Distros Unpatched Vulnerability : CVE-2026-17543

critical Nessus Plugin ID 331284

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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.

 - Improper escaping of backslashes in attacker-provided parameters would allow for trivial SQL injection in PHP versions from 8.2.* before 8.2.33, from 8.3.* before 8.3.33, from 8.4.* before 8.4.24, and from 8.5.* before 8.5.9. (CVE-2026-17543)

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-2026-17543

https://ubuntu.com/security/CVE-2026-17543

Plugin Details

Severity: Critical

ID: 331284

File Name: unpatched_CVE_2026_17543.nasl

Version: 1.9

Type: Local

Agent: unix

Family: Misc.

Published: 7/30/2026

Updated: 8/20/2026

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: High

Score: 7.6

Percentile: 98.37

CVSS v2

Risk Factor: High

Base Score: 7.5

Temporal Score: 6.8

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

CVSS Score Source: CVE-2026-17543

CVSS v3

Risk Factor: Critical

Base Score: 9.8

Temporal Score: 9.3

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

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

CVSS v4

Risk Factor: Critical

Base Score: 9.3

Threat Score: 8.9

Threat Vector: CVSS:4.0/E:P

Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

Vulnerability Information

CPE: cpe:/o:canonical:ubuntu_linux:14.04:-:lts, cpe:/o:canonical:ubuntu_linux:16.04:-:lts, cpe:/o:canonical:ubuntu_linux:18.04:-:lts, cpe:/o:canonical:ubuntu_linux:20.04:-:lts, cpe:/o:canonical:ubuntu_linux:22.04:-:lts, cpe:/o:canonical:ubuntu_linux:24.04:-:lts, cpe:/o:canonical:ubuntu_linux:26.04:-:lts, 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:canonical:ubuntu_linux:php5, p-cpe:/a:canonical:ubuntu_linux:php7.0, p-cpe:/a:canonical:ubuntu_linux:php7.2, p-cpe:/a:canonical:ubuntu_linux:php7.4, p-cpe:/a:canonical:ubuntu_linux:php8.1, p-cpe:/a:canonical:ubuntu_linux:php8.3, p-cpe:/a:canonical:ubuntu_linux:php8.5, p-cpe:/a:centos:centos:apcu-panel, p-cpe:/a:centos:centos:libzip-devel, p-cpe:/a:centos:centos:libzip-tools, p-cpe:/a:centos:centos:libzip, p-cpe:/a:centos:centos:php-bcmath, p-cpe:/a:centos:centos:php-cli, p-cpe:/a:centos:centos:php-common, p-cpe:/a:centos:centos:php-dba, p-cpe:/a:centos:centos:php-dbg, p-cpe:/a:centos:centos:php-devel, p-cpe:/a:centos:centos:php-embedded, p-cpe:/a:centos:centos:php-enchant, p-cpe:/a:centos:centos:php-ffi, p-cpe:/a:centos:centos:php-fpm, p-cpe:/a:centos:centos:php-gd, p-cpe:/a:centos:centos:php-gmp, p-cpe:/a:centos:centos:php-intl, p-cpe:/a:centos:centos:php-json, p-cpe:/a:centos:centos:php-ldap, p-cpe:/a:centos:centos:php-mbstring, p-cpe:/a:centos:centos:php-mysqlnd, p-cpe:/a:centos:centos:php-odbc, p-cpe:/a:centos:centos:php-opcache, p-cpe:/a:centos:centos:php-pdo, p-cpe:/a:centos:centos:php-pear, p-cpe:/a:centos:centos:php-pecl-apcu-devel, p-cpe:/a:centos:centos:php-pecl-apcu, p-cpe:/a:centos:centos:php-pecl-rrd, p-cpe:/a:centos:centos:php-pecl-xdebug3, p-cpe:/a:centos:centos:php-pecl-xdebug, p-cpe:/a:centos:centos:php-pecl-zip, p-cpe:/a:centos:centos:php-pgsql, p-cpe:/a:centos:centos:php-process, p-cpe:/a:centos:centos:php-recode, p-cpe:/a:centos:centos:php-snmp, p-cpe:/a:centos:centos:php-soap, p-cpe:/a:centos:centos:php-xml, p-cpe:/a:centos:centos:php-xmlrpc, p-cpe:/a:centos:centos:php, p-cpe:/a:redhat:enterprise_linux:apcu-panel, p-cpe:/a:redhat:enterprise_linux:libzip-devel, p-cpe:/a:redhat:enterprise_linux:libzip-tools, p-cpe:/a:redhat:enterprise_linux:libzip, p-cpe:/a:redhat:enterprise_linux:php-bcmath, p-cpe:/a:redhat:enterprise_linux:php-cli, p-cpe:/a:redhat:enterprise_linux:php-common, p-cpe:/a:redhat:enterprise_linux:php-dba, p-cpe:/a:redhat:enterprise_linux:php-dbg, p-cpe:/a:redhat:enterprise_linux:php-devel, p-cpe:/a:redhat:enterprise_linux:php-embedded, p-cpe:/a:redhat:enterprise_linux:php-enchant, p-cpe:/a:redhat:enterprise_linux:php-ffi, p-cpe:/a:redhat:enterprise_linux:php-fpm, p-cpe:/a:redhat:enterprise_linux:php-gd, p-cpe:/a:redhat:enterprise_linux:php-gmp, p-cpe:/a:redhat:enterprise_linux:php-intl, p-cpe:/a:redhat:enterprise_linux:php-json, p-cpe:/a:redhat:enterprise_linux:php-ldap, p-cpe:/a:redhat:enterprise_linux:php-mbstring, p-cpe:/a:redhat:enterprise_linux:php-mysqlnd, p-cpe:/a:redhat:enterprise_linux:php-odbc, p-cpe:/a:redhat:enterprise_linux:php-opcache, p-cpe:/a:redhat:enterprise_linux:php-pdo, p-cpe:/a:redhat:enterprise_linux:php-pear, p-cpe:/a:redhat:enterprise_linux:php-pecl-apcu-devel, p-cpe:/a:redhat:enterprise_linux:php-pecl-apcu, p-cpe:/a:redhat:enterprise_linux:php-pecl-rrd, p-cpe:/a:redhat:enterprise_linux:php-pecl-xdebug3, p-cpe:/a:redhat:enterprise_linux:php-pecl-xdebug, p-cpe:/a:redhat:enterprise_linux:php-pecl-zip, p-cpe:/a:redhat:enterprise_linux:php-pgsql, p-cpe:/a:redhat:enterprise_linux:php-process, p-cpe:/a:redhat:enterprise_linux:php-recode, p-cpe:/a:redhat:enterprise_linux:php-snmp, p-cpe:/a:redhat:enterprise_linux:php-soap, p-cpe:/a:redhat:enterprise_linux:php-xml, p-cpe:/a:redhat:enterprise_linux:php-xmlrpc, p-cpe:/a:redhat:enterprise_linux:php

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

Exploit Available: true

Exploit Ease: Exploits are available

Vulnerability Publication Date: 7/30/2026

Reference Information

CVE: CVE-2026-17543