CVE-2026-45205: Apache Commons Configuration: StackOverflowError for YAML input with cycles

["Gary D. Gregory" <ggregory () apache org>]

Severity: low 

Affected versions:

- Apache Commons Configuration (org.apache.commons:commons-configuration2) 2.2 before 2.15.0

Description:

Uncontrolled Recursion vulnerability in Apache Commons.

When processing an untrusted configuration file, Commons Configuration will throw a StackOverflowError for YAML input 
with cycles.
This issue affects Apache Commons: from 2.2 before 2.15.0.

Users are recommended to upgrade to version 2.15.0, which fixes the issue.

Credit:

Erichen, Institute of Computing Technology, Chinese Academy of Sciences (reporter)

References:

https://github.com/apache/commons-configuration/pull/634
https://commons.apache.org/
https://www.cve.org/CVERecord?id=CVE-2026-45205