CVE-2026-43825 Apache OpenNLP :: Core :: ML :: LibSVM: Unsafe Java Deserialization in SvmDoccatModel

Untrusted Java Deserialization in Apache OpenNLP SvmDoccatModel Versions Affected: before 3.0.0-M4 libsvm document categorization module; introduced in OPENNLP-1808 and only present on the 3.x line Description: SvmDoccatModel.deserializeInputStream reads an attacker-controlled stream with...

PT-2026-55955

Name of the Vulnerable Software and Affected Versions Apache OpenNLP versions prior to 3.0.0-M4 Description Untrusted Java deserialization occurs in the SvmDoccatModel.deserializeInputStream function. The function uses java.io.ObjectInputStream to read an attacker-controlled stream and calls...

CVE-2026-42440

A flaw was found in Apache OpenNLP. A remote attacker can exploit this vulnerability by providing a specially crafted binary model .bin file. This file contains an excessively large count field, which leads to an unbounded array allocation and triggers an OutOfMemoryError. Successful exploitation...

CVE-2026-42027

A flaw was found in Apache OpenNLP. An attacker, by providing a specially crafted model archive, can exploit a vulnerability in the ExtensionLoader component. This allows the attacker to force the system to load and initialize any class present on the classpath, executing its static initializer...

SUSE CVE-2026-40682

XML External Entity XXE via Unsanitized Dictionary Parsing in Apache OpenNLP DictionaryEntryPersistor Versions Affected: before 2.5.9, before 3.0.0-M3 Description: The DictionaryEntryPersistor class initializes a static SAXParserFactory at class-load time without enabling FEATURESECUREPROCESSING ...

SUSE CVE-2026-42027

Arbitrary Class Instantiation via Model Manifest in Apache OpenNLP ExtensionLoader Versions Affected: before 1.9.5, before 2.5.9, before 3.0.0-M3 Description: The ExtensionLoader.instantiateExtensionClass, String method loads a class by its fully-qualified name via Class.forName and invokes its...

Linux Distros Unpatched Vulnerability : CVE-2026-42440

"The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available. - OOM Denial of Service via Unbounded Array Allocation in Apache OpenNLP AbstractModelReader Versions Affected: before 1.9.5 before 2.5.9 before 3.0.0-M3...

Linux Distros Unpatched Vulnerability : CVE-2026-40682

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available. - XML External Entity XXE via Unsanitized Dictionary Parsing in Apache OpenNLP DictionaryEntryPersistor Versions Affected: before 2.5.9, before 3.0.0-M3...

GHSA-CX4M-2P55-RW7J Apache OpenNLP ExtensionLoader Vulnerable to Arbitrary Class Instantiation via Model Manifest

Versions Affected: before 1.9.5, before 2.5.9, before 3.0.0-M3 Description: The ExtensionLoader.instantiateExtensionClass, String method loads a class by its fully-qualified name via Class.forName and invokes its no-arg constructor, with the class name sourced from the manifest.properties entry o...

Apache OpenNLP ExtensionLoader Vulnerable to Arbitrary Class Instantiation via Model Manifest

Versions Affected: before 1.9.5, before 2.5.9, before 3.0.0-M3 Description: The ExtensionLoader.instantiateExtensionClass, String method loads a class by its fully-qualified name via Class.forName and invokes its no-arg constructor, with the class name sourced from the manifest.properties entry o...

XML External Entity (XXE) Injection

Overview org.apache.opennlp:opennlp-tools is an is a machine learning based toolkit for the processing of natural language text. Affected versions of this package are vulnerable to XML External Entity XXE Injection via the create method in the DictionaryEntryPersistor class, which initializes a...

Unsafe Reflection

Overview org.apache.opennlp:opennlp-tools is an is a machine learning based toolkit for the processing of natural language text. Affected versions of this package are vulnerable to Unsafe Reflection that leads to arbitrary class instantiation, via the instantiateExtension method in the...

Unsafe Reflection

Overview Affected versions of this package are vulnerable to Unsafe Reflection that leads to arbitrary class instantiation, via the instantiateExtension method in the ExtensionLoader class. An attacker can trigger the static initializer of any class present on the classpath by supplying a model...

Memory Allocation with Excessive Size Value

Overview org.apache.opennlp:opennlp-tools is an is a machine learning based toolkit for the processing of natural language text. Affected versions of this package are vulnerable to Memory Allocation with Excessive Size Value in the AbstractModelReader class. An attacker can cause the application ...

DEBIAN-CVE-2026-42440

OOM Denial of Service via Unbounded Array Allocation in Apache OpenNLP AbstractModelReader Versions Affected: before 1.9.5 before 2.5.9 before 3.0.0-M3 Description: The AbstractModelReader methods getOutcomes, getOutcomePatterns, and getPredicates each read a 32-bit signed integer count field...

CVE-2026-42440

OOM Denial of Service via Unbounded Array Allocation in Apache OpenNLP AbstractModelReader Versions Affected: before 1.9.5 before 2.5.9 before 3.0.0-M3 Description: The AbstractModelReader methods getOutcomes, getOutcomePatterns, and getPredicates each read a 32-bit signed integer count field...

DEBIAN-CVE-2026-42027

Arbitrary Class Instantiation via Model Manifest in Apache OpenNLP ExtensionLoader Versions Affected: before 1.9.5, before 2.5.9, before 3.0.0-M3 Description: The ExtensionLoader.instantiateExtensionClass, String method loads a class by its fully-qualified name via Class.forName and invokes its...

CVE-2026-42027

Arbitrary Class Instantiation via Model Manifest in Apache OpenNLP ExtensionLoader Versions Affected: before 1.9.5, before 2.5.9, before 3.0.0-M3 Description: The ExtensionLoader.instantiateExtensionClass, String method loads a class by its fully-qualified name via Class.forName and invokes its...

CVE-2026-40682

XML External Entity XXE via Unsanitized Dictionary Parsing in Apache OpenNLP DictionaryEntryPersistor Versions Affected: before 2.5.9, before 3.0.0-M3 Description: The DictionaryEntryPersistor class initializes a static SAXParserFactory at class-load time without enabling FEATURESECUREPROCESSING ...

UBUNTU-CVE-2026-42027

Arbitrary Class Instantiation via Model Manifest in Apache OpenNLP ExtensionLoader Versions Affected: before 1.9.5, before 2.5.9, before 3.0.0-M3 Description: The ExtensionLoader.instantiateExtensionClass, String method loads a class by its fully-qualified name via Class.forName and invokes its...