Apache Commons Digester 3.2 XXE Vulnerability


Vendor: The Apache Software Foundation
Product web page: https://commons.apache.org/proper/commons-digester/
Affected version: 3.2

Summary: Apache Commons Digester is a Java library from the Apache Commons
project that converts XML documents into trees of Java objects.

Desc: Apache Commons Digester creates its SAX parser factory with no
protections against document type definitions or external entities,
and the default entity resolver resolves unregistered external entities,
so any application that parses untrusted XML with Digester is exposed
to local file disclosure, server-side request forgery, and entity-expansion
denial of service. Commons libraries are designed to operate on trusted
or application-validated input, so applications should not parse untrusted
XML with Digester without hardening the parser factory.

Tested on: Microsoft Windows 10 (x86_64)
           Eclipse Temurin OpenJDK 21.0.6 (LTS)


Vulnerability discovered by Gjoko 'LiquidWorm' Krstic
                            @zeroscience


Advisory ID: ZSL-2026-6036
Advisory URL: https://www.zeroscience.mk/#/advisories/ZSL-2026-6036


13.08.2026

--


$ curl -s -X POST --data-binary @ze_xxe_payload.xml \
> -H 'Content-Type: application/xml' \
> http://TARGET/KALAKOTER