CVE-2026-45205: CWE-674 Uncontrolled Recursion in Apache Software Foundation Apache Commons Configuration
An uncontrolled recursion vulnerability exists in Apache Commons Configuration when processing YAML configuration files containing cycles. This can cause a StackOverflowError, leading to a denial of service. The issue affects versions from 2.2 up to but not including 2.15.0. Upgrading to version 2.15.0 resolves the problem.
AI Analysis
Technical Summary
CVE-2026-45205 is a CWE-674 uncontrolled recursion vulnerability in Apache Commons Configuration. When parsing untrusted YAML configuration files with cyclic references, the library may enter infinite recursion, resulting in a StackOverflowError. This affects Apache Commons Configuration versions starting at 2.2 and prior to 2.15.0. The vulnerability does not impact confidentiality or integrity but causes availability loss due to application crashes. The vendor recommends upgrading to version 2.15.0 where the issue is fixed.
Potential Impact
The vulnerability causes a denial of service by crashing the application with a StackOverflowError when processing malicious YAML input containing cycles. There is no impact on confidentiality or integrity. The CVSS score is 5.3 (medium severity), reflecting network attack vector, low complexity, no privileges or user interaction required, and impact limited to availability.
Mitigation Recommendations
Users should upgrade Apache Commons Configuration to version 2.15.0 or later, where this uncontrolled recursion issue is fixed. No other mitigations or temporary workarounds are indicated. Patch status is not explicitly stated in the vendor advisory, but the recommended upgrade version confirms an official fix is available.
CVE-2026-45205: CWE-674 Uncontrolled Recursion in Apache Software Foundation Apache Commons Configuration
Description
An uncontrolled recursion vulnerability exists in Apache Commons Configuration when processing YAML configuration files containing cycles. This can cause a StackOverflowError, leading to a denial of service. The issue affects versions from 2.2 up to but not including 2.15.0. Upgrading to version 2.15.0 resolves the problem.
CVSS v3.1
Score 5.3medium
Affected software
pkg:maven/org.apache.commons/commons-configuration2Run on your own infrastructure? Check whether these packages are installed with threat-finder — our free open-source scanner.
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-45205 is a CWE-674 uncontrolled recursion vulnerability in Apache Commons Configuration. When parsing untrusted YAML configuration files with cyclic references, the library may enter infinite recursion, resulting in a StackOverflowError. This affects Apache Commons Configuration versions starting at 2.2 and prior to 2.15.0. The vulnerability does not impact confidentiality or integrity but causes availability loss due to application crashes. The vendor recommends upgrading to version 2.15.0 where the issue is fixed.
Potential Impact
The vulnerability causes a denial of service by crashing the application with a StackOverflowError when processing malicious YAML input containing cycles. There is no impact on confidentiality or integrity. The CVSS score is 5.3 (medium severity), reflecting network attack vector, low complexity, no privileges or user interaction required, and impact limited to availability.
Mitigation Recommendations
Users should upgrade Apache Commons Configuration to version 2.15.0 or later, where this uncontrolled recursion issue is fixed. No other mitigations or temporary workarounds are indicated. Patch status is not explicitly stated in the vendor advisory, but the recommended upgrade version confirms an official fix is available.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- apache
- Date Reserved
- 2026-05-11T13:16:23.243Z
- Cvss Version
- null
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 6a05b3c8ec166c07b0d21acd
Added to database: 05/14/2026, 11:36:40 UTC
Last enriched: 06/09/2026, 10:43:03 UTC
Last updated: 07/31/2026, 19:22:59 UTC
Views: 121
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