---
id: CVE-2026-73098
title: >-
  Apache Juneau: Unsafe reflection allows attacker-controlled class
  initialization during parsing
summary: >-
  Improper control of dynamically-loaded code vulnerability in Apache Juneau.


  When Apache Juneau parses a value into a property of type java.lang.Class
  (including parameterized forms), the default class swap loaded the named class
  with in…
severity: critical
cvss: 10
cvssVector: 'CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H'
cvssSource: cna
cwe:
  - CWE-470
vendor: Apache Software Foundation
product: 'org.apache.juneau:juneau-marshall'
affected:
  - 'org.apache.juneau:juneau-marshall < 9.2.1'
ssvc:
  exploitation: none
  automatable: 'yes'
  technicalImpact: total
  timestamp: '2026-11-05T16:58:46.303904Z'
published: '2026-11-05'
updated: '2026-11-05'
sourceUpdated: '2026-11-05T19:04:12.529Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-73098'
references:
  - url: 'https://lists.apache.org/thread.html/j05q7vw08j48o96tdlzcsd4sozx1lyl6'
tags:
  - cve.org
ingestedAt: '2026-11-05T22:38:31.500Z'
---

## Overview

Improper control of dynamically-loaded code vulnerability in Apache Juneau.

When Apache Juneau parses a value into a property of type java.lang.Class (including parameterized forms), the default class swap loaded the named class with initialization enabled, so input naming a class on the application classpath ran that class's static initializer. The impact depends on the classes present in the deployment.

This issue affects Apache Juneau: through 9.2.0.

Users are recommended to upgrade to version 9.2.1, which fixes the issue.

## Affected

- `org.apache.juneau:juneau-marshall < 9.2.1`

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.