What is CVE-2026-45205?

CVE-2026-45205 is a medium-severity vulnerability in Apache Commons Configuration, classified under Uncontrolled Recursion. CVSS score: 5.3/10. Published 2026-05-14.

How severe is CVE-2026-45205?

Medium severity. CVSS v3 base score is 5.3 out of 10.

Vulnerability in Apache Commons Configuration

CVE-2026-45205

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.

EPSS: 0.005 (38.9th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 5.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L.

Affected products

Apache Commons_configuration
Apache Software Foundation Commons Configuration — versions 2.2

Weakness classification (CWE)

CWE-674 — Uncontrolled Recursion

References

security@apache.org (Patch, patch, Issue Tracking)
security@apache.org (vendor-advisory, Mailing List, Vendor Advisory)
af854a3a-2127-422b-91ae-364da2661108 (Mailing List, Third Party Advisory)

Frequently asked questions

What is CVE-2026-45205?: CVE-2026-45205 is a medium-severity vulnerability in Apache Commons Configuration, classified under Uncontrolled Recursion. CVSS score: 5.3/10. Published 2026-05-14.
How severe is CVE-2026-45205?: Medium severity. CVSS v3 base score is 5.3 out of 10.