Linux Distros Unpatched Vulnerability : CVE-2026-24400

high Nessus Plugin ID 296899

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.

- AssertJ provides Fluent testing assertions for Java and the Java Virtual Machine (JVM). Starting in version 1.4.0 and prior to version 3.27.7, an XML External Entity (XXE) vulnerability exists in `org.assertj.core.util.xml.XmlStringPrettyFormatter`: the `toXmlDocument(String)` method initializes `DocumentBuilderFactory` with default settings, without disabling DTDs or external entities. This formatter is used by the `isXmlEqualTo(CharSequence)` assertion for `CharSequence` values. An application is vulnerable only when it uses untrusted XML input with either `isXmlEqualTo(CharSequence)` from `org.assertj.core.api.AbstractCharSequenceAssert` or `xmlPrettyFormat(String)` from `org.assertj.core.util.xml.XmlStringPrettyFormatter`. If untrusted XML input is processed by tone of these methods, an attacker couldnread arbitrary local files via `file://` URIs (e.g., `/etc/passwd`, application configuration files); perform Server-Side Request Forgery (SSRF) via HTTP/HTTPS URIs, and/or cause Denial of Service via Billion Laughs entity expansion attacks. `isXmlEqualTo(CharSequence)` has been deprecated in favor of XMLUnit in version 3.18.0 and will be removed in version 4.0. Users of affected versions should, in order of preference: replace `isXmlEqualTo(CharSequence)` with XMLUnit, upgrade to version 3.27.7, or avoid using `isXmlEqualTo(CharSequence)` or `XmlStringPrettyFormatter` with untrusted input.
`XmlStringPrettyFormatter` has historically been considered a utility for `isXmlEqualTo(CharSequence)` rather than a feature for AssertJ users, so it is deprecated in version 3.27.7 and removed in version 4.0, with no replacement. (CVE-2026-24400)

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

Solution

There is no known solution at this time.

Plugin Details

Severity: High

ID: 296899

File Name: unpatched_CVE_2026_24400.nasl

Version: 1.1

Type: local

Agent: unix

Family: Misc.

Published: 1/27/2026

Updated: 1/27/2026

Supported Sensors: Nessus Agent, Nessus

Risk Information

CVSS v2

Risk Factor: Medium

Base Score: 6.4

Temporal Score: 5.4

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

CVSS Score Source: CVE-2026-24400

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:H/I:N/A:H

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

CVSS v4

Risk Factor: High

Base Score: 8.2

Threat Score: 5.5

Threat Vector: CVSS:4.0/E:U

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

Vulnerability Information

CPE: cpe:/o:redhat:enterprise_linux:8, p-cpe:/a:redhat:enterprise_linux:log4j, p-cpe:/a:centos:centos:log4j, cpe:/o:centos:centos:8, cpe:/o:redhat:enterprise_linux:9, cpe:/o:redhat:enterprise_linux:10, p-cpe:/a:redhat:enterprise_linux:assertj-core, p-cpe:/a:redhat:enterprise_linux:assertj-core-javadoc, p-cpe:/a:redhat:enterprise_linux:maven-enforcer-api, p-cpe:/a:redhat:enterprise_linux:maven-enforcer-plugin, p-cpe:/a:redhat:enterprise_linux:maven-enforcer-rules, p-cpe:/a:redhat:enterprise_linux:maven-failsafe-plugin, p-cpe:/a:redhat:enterprise_linux:maven-surefire, p-cpe:/a:redhat:enterprise_linux:maven-surefire-javadoc, p-cpe:/a:redhat:enterprise_linux:maven-surefire-plugin, p-cpe:/a:redhat:enterprise_linux:maven-surefire-provider-junit, p-cpe:/a:redhat:enterprise_linux:maven-surefire-provider-testng, p-cpe:/a:redhat:enterprise_linux:maven-surefire-report-parser, p-cpe:/a:redhat:enterprise_linux:maven-surefire-report-plugin, p-cpe:/a:redhat:enterprise_linux:powermock, p-cpe:/a:redhat:enterprise_linux:powermock-api-easymock, p-cpe:/a:redhat:enterprise_linux:powermock-api-mockito, p-cpe:/a:redhat:enterprise_linux:powermock-api-support, p-cpe:/a:redhat:enterprise_linux:powermock-common, p-cpe:/a:redhat:enterprise_linux:powermock-core, p-cpe:/a:redhat:enterprise_linux:powermock-javadoc, p-cpe:/a:redhat:enterprise_linux:powermock-junit4, p-cpe:/a:redhat:enterprise_linux:powermock-reflect, p-cpe:/a:redhat:enterprise_linux:powermock-testng, p-cpe:/a:centos:centos:log4j-jcl, p-cpe:/a:centos:centos:log4j-slf4j, p-cpe:/a:redhat:enterprise_linux:log4j-jcl, p-cpe:/a:redhat:enterprise_linux:log4j-slf4j, p-cpe:/a:centos:centos:maven-enforcer-api, p-cpe:/a:centos:centos:maven-enforcer-plugin, p-cpe:/a:centos:centos:maven-enforcer-rules, p-cpe:/a:centos:centos:maven-failsafe-plugin, p-cpe:/a:centos:centos:maven-surefire, p-cpe:/a:centos:centos:maven-surefire-javadoc, p-cpe:/a:centos:centos:maven-surefire-plugin, p-cpe:/a:centos:centos:maven-surefire-provider-junit, p-cpe:/a:centos:centos:maven-surefire-provider-testng, p-cpe:/a:centos:centos:maven-surefire-report-parser, p-cpe:/a:centos:centos:maven-surefire-report-plugin, p-cpe:/a:centos:centos:moditect, p-cpe:/a:centos:centos:moditect-javadoc, p-cpe:/a:redhat:enterprise_linux:moditect, p-cpe:/a:redhat:enterprise_linux:moditect-javadoc, p-cpe:/a:centos:centos:log4j-web, p-cpe:/a:redhat:enterprise_linux:log4j-web, p-cpe:/a:centos:centos:powermock, p-cpe:/a:centos:centos:powermock-api-easymock, p-cpe:/a:centos:centos:powermock-core, p-cpe:/a:centos:centos:assertj-core-javadoc, p-cpe:/a:centos:centos:assertj-core, p-cpe:/a:centos:centos:powermock-api-mockito, p-cpe:/a:centos:centos:powermock-junit4, p-cpe:/a:centos:centos:powermock-common, p-cpe:/a:centos:centos:powermock-javadoc, p-cpe:/a:centos:centos:powermock-reflect, p-cpe:/a:centos:centos:powermock-testng, p-cpe:/a:centos:centos:powermock-api-support

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: 1/26/2026

Reference Information

CVE: CVE-2026-24400

Detections

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