Detections
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Linux Distros Unpatched Vulnerability : CVE-2026-53404

high Nessus Plugin ID 323918

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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.

 - Always-Incorrect Control Flow Implementation vulnerability in Apache Tomcat's rewrite valve meant that if the first condition in an OR chain matched, subsequent non-OR conditions were skipped. This issue affects Apache Tomcat: from 11.0.0-M1 through 11.0.22, from 10.1.0-M1 through 10.1.55, from 9.0.0.M1 through 9.0.118, from 8.5.0 through 8.5.100. Other versions that have reached end of support may also be affected.
 Users are recommended to upgrade to version 11.0.23, 10.1.56 or 9.0.119, which fix the issue.
 (CVE-2026-53404)

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-2026-53404

https://security-tracker.debian.org/tracker/CVE-2026-53404

https://ubuntu.com/security/CVE-2026-53404

Plugin Details

Severity: High

ID: 323918

File Name: unpatched_CVE_2026_53404.nasl

Version: 1.5

Type: Local

Agent: unix

Family: Misc.

Published: 6/30/2026

Updated: 7/16/2026

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: 2.8

Percentile: 22.49

CVSS v2

Risk Factor: High

Base Score: 7.8

Temporal Score: 6.6

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

CVSS Score Source: CVE-2026-53404

CVSS v3

Risk Factor: High

Base Score: 7.3

Temporal Score: 6.7

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

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

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:25.10, cpe:/o:canonical:ubuntu_linux:26.04:-:lts, cpe:/o:centos:centos:7, cpe:/o:centos:centos:8, cpe:/o:debian:debian_linux:12.0, cpe:/o:debian:debian_linux:13.0, cpe:/o:debian:debian_linux:14.0, cpe:/o:redhat:enterprise_linux:10, cpe:/o:redhat:enterprise_linux:6, cpe:/o:redhat:enterprise_linux:7, cpe:/o:redhat:enterprise_linux:8, cpe:/o:redhat:enterprise_linux:9, p-cpe:/a:canonical:ubuntu_linux:tomcat10, p-cpe:/a:canonical:ubuntu_linux:tomcat11, p-cpe:/a:canonical:ubuntu_linux:tomcat6, p-cpe:/a:canonical:ubuntu_linux:tomcat7, p-cpe:/a:canonical:ubuntu_linux:tomcat9, p-cpe:/a:centos:centos:pki-servlet-4.0-api, p-cpe:/a:centos:centos:pki-servlet-engine, p-cpe:/a:centos:centos:tomcat-admin-webapps, p-cpe:/a:centos:centos:tomcat-docs-webapp, p-cpe:/a:centos:centos:tomcat-el-2.2-api, p-cpe:/a:centos:centos:tomcat-el-3.0-api, p-cpe:/a:centos:centos:tomcat-el-5.0-api, p-cpe:/a:centos:centos:tomcat-javadoc, p-cpe:/a:centos:centos:tomcat-jsp-2.2-api, p-cpe:/a:centos:centos:tomcat-jsp-2.3-api, p-cpe:/a:centos:centos:tomcat-jsp-3.1-api, p-cpe:/a:centos:centos:tomcat-jsvc, p-cpe:/a:centos:centos:tomcat-lib, p-cpe:/a:centos:centos:tomcat-servlet-3.0-api, p-cpe:/a:centos:centos:tomcat-servlet-4.0-api, p-cpe:/a:centos:centos:tomcat-servlet-6.0-api, p-cpe:/a:centos:centos:tomcat-webapps, p-cpe:/a:centos:centos:tomcat6-admin-webapps, p-cpe:/a:centos:centos:tomcat6-docs-webapp, p-cpe:/a:centos:centos:tomcat6-el-2.1-api, p-cpe:/a:centos:centos:tomcat6-javadoc, p-cpe:/a:centos:centos:tomcat6-jsp-2.1-api, p-cpe:/a:centos:centos:tomcat6-lib, p-cpe:/a:centos:centos:tomcat6-log4j, p-cpe:/a:centos:centos:tomcat6-servlet-2.5-api, p-cpe:/a:centos:centos:tomcat6-webapps, p-cpe:/a:centos:centos:tomcat6, p-cpe:/a:centos:centos:tomcat9-admin-webapps, p-cpe:/a:centos:centos:tomcat9-docs-webapp, p-cpe:/a:centos:centos:tomcat9-el-3.0-api, p-cpe:/a:centos:centos:tomcat9-jsp-2.3-api, p-cpe:/a:centos:centos:tomcat9-lib, p-cpe:/a:centos:centos:tomcat9-servlet-4.0-api, p-cpe:/a:centos:centos:tomcat9-webapps, p-cpe:/a:centos:centos:tomcat9, p-cpe:/a:centos:centos:tomcat, p-cpe:/a:debian:debian_linux:tomcat10, p-cpe:/a:debian:debian_linux:tomcat11, p-cpe:/a:redhat:enterprise_linux:pki-servlet-4.0-api, p-cpe:/a:redhat:enterprise_linux:pki-servlet-engine, p-cpe:/a:redhat:enterprise_linux:tomcat-admin-webapps, p-cpe:/a:redhat:enterprise_linux:tomcat-docs-webapp, p-cpe:/a:redhat:enterprise_linux:tomcat-el-2.2-api, p-cpe:/a:redhat:enterprise_linux:tomcat-el-3.0-api, p-cpe:/a:redhat:enterprise_linux:tomcat-el-5.0-api, p-cpe:/a:redhat:enterprise_linux:tomcat-javadoc, p-cpe:/a:redhat:enterprise_linux:tomcat-jsp-2.2-api, p-cpe:/a:redhat:enterprise_linux:tomcat-jsp-2.3-api, p-cpe:/a:redhat:enterprise_linux:tomcat-jsp-3.1-api, p-cpe:/a:redhat:enterprise_linux:tomcat-jsvc, p-cpe:/a:redhat:enterprise_linux:tomcat-lib, p-cpe:/a:redhat:enterprise_linux:tomcat-servlet-3.0-api, p-cpe:/a:redhat:enterprise_linux:tomcat-servlet-4.0-api, p-cpe:/a:redhat:enterprise_linux:tomcat-servlet-6.0-api, p-cpe:/a:redhat:enterprise_linux:tomcat-webapps, p-cpe:/a:redhat:enterprise_linux:tomcat6-admin-webapps, p-cpe:/a:redhat:enterprise_linux:tomcat6-docs-webapp, p-cpe:/a:redhat:enterprise_linux:tomcat6-el-2.1-api, p-cpe:/a:redhat:enterprise_linux:tomcat6-javadoc, p-cpe:/a:redhat:enterprise_linux:tomcat6-jsp-2.1-api, p-cpe:/a:redhat:enterprise_linux:tomcat6-lib, p-cpe:/a:redhat:enterprise_linux:tomcat6-log4j, p-cpe:/a:redhat:enterprise_linux:tomcat6-servlet-2.5-api, p-cpe:/a:redhat:enterprise_linux:tomcat6-webapps, p-cpe:/a:redhat:enterprise_linux:tomcat6, p-cpe:/a:redhat:enterprise_linux:tomcat9-admin-webapps, p-cpe:/a:redhat:enterprise_linux:tomcat9-docs-webapp, p-cpe:/a:redhat:enterprise_linux:tomcat9-el-3.0-api, p-cpe:/a:redhat:enterprise_linux:tomcat9-jsp-2.3-api, p-cpe:/a:redhat:enterprise_linux:tomcat9-lib, p-cpe:/a:redhat:enterprise_linux:tomcat9-servlet-4.0-api, p-cpe:/a:redhat:enterprise_linux:tomcat9-webapps, p-cpe:/a:redhat:enterprise_linux:tomcat9, p-cpe:/a:redhat:enterprise_linux:tomcat

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: 6/22/2026

Reference Information

CVE: CVE-2026-53404