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Apache Tomcat 9.0.92 < 9.0.117 Improper Authentication Vulnerability (CVE-2026-34500)

medium Nessus Plugin ID 307003

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Synopsis

The remote Apache Tomcat server is affected by an improper authentication vulnerability

Description

The version of Tomcat installed on the remote host is 9.0.92 prior to 9.0.117. It is, therefore, affected by a vulnerability as referenced in the fixed_in_apache_tomcat_9.0.117_security-9 advisory.

 - CLIENT_CERT authentication does not fail as expected for some scenarios when soft fail is disabled and FFM is used in Apache Tomcat. This issue affects Apache Tomcat: from 11.0.0-M14 through 11.0.20, from 10.1.22 through 10.1.53, from 9.0.92 through 9.0.116. Users are recommended to upgrade to version 11.0.21, 10.1.54 or 9.0.117, which fixes the issue. (CVE-2026-34500)

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

Solution

Upgrade to Apache Tomcat version 9.0.117 or later.

See Also

http://www.nessus.org/u?6163db21

http://www.nessus.org/u?66d56d5e

Plugin Details

Severity: Medium

ID: 307003

File Name: tomcat_9_0_117.nasl

Version: 1.4

Type: Combined

Agent: windows, macosx, unix

Family: Web Servers

Published: 4/17/2026

Updated: 8/11/2026

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

Risk Information

VPR

Risk Factor: Low

Score: 3.5

Percentile: 52.03

CVSS v2

Risk Factor: Medium

Base Score: 6.1

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

CVSS Score Source: CVE-2026-34500

CVSS v3

Risk Factor: Medium

Base Score: 6.5

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

Vulnerability Information

CPE: cpe:/a:apache:tomcat:9

Required KB Items: installed_sw/Apache Tomcat

Patch Publication Date: 4/3/2026

Vulnerability Publication Date: 4/4/2026

Reference Information

CVE: CVE-2026-34500