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Security Bulletin: Apache Commons Configuration Denial of Service via YAML Cycle

Security Bulletin


Summary

Apache Commons Configuration versions 2.2 through 2.14.x are vulnerable to an uncontrolled recursion denial of service. When parsing an untrusted YAML configuration file that contains cyclic references, the library throws a StackOverflowError, which can crash the processing thread and make the application unresponsive. An attacker who can supply a crafted YAML file to an application using Commons Configuration can exploit this to cause a denial of service. Users are recommended to upgrade to Apache Commons Configuration version 2.15.0 or later, which resolves the issue.

Vulnerability Details

CVEID:   CVE-2026-45205
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.
CWE:   CWE-674: Uncontrolled Recursion
CVSS Source:   CISA ADP
CVSS Base score:   5.3
CVSS Vector:   (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L)

Affected Products and Versions

Affected Product(s)Version(s)
IBM Content Navigator26.0.0.0
IBM Content Navigator3.1.0.0
IBM Content Navigator3.0.15.0
IBM Content Navigator3.2.0.0

Remediation/Fixes

IBM strongly recommends addressing the vulnerability now by upgrading.

Affected Product(s)Version(s)Remediation / Fix
IBM Content Navigator26.0.0.0 Apply security fix 26.0.0-IF001
IBM Content Navigator3.1.0.0Apply security fix 3.1.0-IF010
IBM Content Navigator3.0.15.0Apply security fix 3.0.15-IF010
IBM Content Navigator3.2.0.0Apply security fix 3.2.0-IF007

Workarounds and Mitigations

None

Get Notified about Future Security Bulletins

References

Off

Acknowledgement

Change History

07 Aug 2026: Initial Publication

*The CVSS Environment Score is customer environment specific and will ultimately impact the Overall CVSS Score. Customers can evaluate the impact of this vulnerability in their environments by accessing the links in the Reference section of this Security Bulletin.

Disclaimer

According to the Forum of Incident Response and Security Teams (FIRST), the Common Vulnerability Scoring System (CVSS) is an "industry open standard designed to convey vulnerability severity and help to determine urgency and priority of response." IBM PROVIDES THE CVSS SCORES ""AS IS"" WITHOUT WARRANTY OF ANY KIND, INCLUDING THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. CUSTOMERS ARE RESPONSIBLE FOR ASSESSING THE IMPACT OF ANY ACTUAL OR POTENTIAL SECURITY VULNERABILITY. In addition to other efforts to address potential vulnerabilities, IBM periodically updates the record of components contained in our product offerings. As part of that effort, if IBM identifies previously unidentified packages in a product/service inventory, we address relevant vulnerabilities regardless of CVE date. Inclusion of an older CVEID does not demonstrate that the referenced product has been used by IBM since that date, nor that IBM was aware of a vulnerability as of that date. We are making clients aware of relevant vulnerabilities as we become aware of them. "Affected Products and Versions" referenced in IBM Security Bulletins are intended to be only products and versions that are supported by IBM and have not passed their end-of-support or warranty date. Thus, failure to reference unsupported or extended-support products and versions in this Security Bulletin does not constitute a determination by IBM that they are unaffected by the vulnerability. Reference to one or more unsupported versions in this Security Bulletin shall not create an obligation for IBM to provide fixes for any unsupported or extended-support products or versions.

Document Location

Worldwide

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Document Information

Modified date:
07 August 2026

Initial Publish date:
07 August 2026

UID

ibm17282866