Review reviewCritical

CVE-2026-42027

Apache Software Foundation Apache OpenNLP, Red Hat build of Apache Camel for Spring Boot 4, Red Hat Data Grid 8

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.instantiateExtension(Class, 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 of a model archive. The existing isAssignableFrom check correctly rejects classes that are not subtypes of the expected extension interface (BaseToolFactory for factory=, ArtifactSerializer for serializer-class-*),...

CVSS: 9.8
EPSS: 0.67%
CISA KEV: Not listed
Published: 2026.05.05

PRIORITY ASSESSMENT

Review review

The CVSS severity warrants an early asset and exposure review.

Known exploitationNot established by KEV

Exploit probability0.67%

Technical severityCVSS 9.8

Vulnerability overview

Affected product and versions

Product: Apache Software Foundation Apache OpenNLP, Red Hat build of Apache Camel for Spring Boot 4, Red Hat Data Grid 8
Affected versions: >= 2.0 < 2.5.9, >= 3.0.0-M1 < 3.0.0-M3, < 1.9.5, < 2.5.9, 3.0.0
Fixed versions: 2.5.9

Recommended response sequence

Confirm exposure before applying a vendor-supported change.

Full remediation guide

1
Identify
Confirm that Apache Software Foundation Apache OpenNLP, Red Hat build of Apache Camel for Spring Boot 4, Red Hat Data Grid 8 and an affected version are present.
2
Prioritize
Combine exploitation signals with asset exposure and business criticality.
3
Remediate
Follow the vendor advisory or supported update path and preserve rollback options.
4
Verify
Recheck the version, service health, access paths, and relevant logs.

Technical data

CVSS vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CWE: CWE-470, CWE-502