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

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.

Published: 2026-05-14 Last update: 2026-05-15 Assigner: [email protected] Source: [email protected]
NVD Status：Analyzed，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2026-45205 is rated Low Risk (30.6/100): CVSS Medium severity, with low exploitation likelihood (EPSS 0.10%). Monitor for updates and reassess as exploit intelligence or EPSS changes.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Exploit prediction scoring system (EPSS) score for CVE-2026-45205

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-05-16 0.02% 0.10% +0.08%
2 2026-05-14 — 0.02% —

Full EPSS history (2 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2026-45205

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
5.3 3.1 MEDIUM
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:N)
No account or special rights needed—anonymous or random user is enough.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:N)
Doesn’t really leak secrets in a meaningful way.
Integrity (I:N)
Data isn’t meaningfully altered or forged.
Availability (A:L)
Might cause slowdowns, glitches, or partial disruption—not a full brick.
 3.9 1.4 134c704f-9b21-4f2e-91b3-4a467353bcc0

Weakness enumeration for CVE-2026-45205

GitHub Security Advisory for CVE-2026-45205

GHSA-337m-mw94-2v6g · Severity: medium · Ecosystem: maven — Apache Commons Configuration: StackOverflowError for YAML input with cycles

OS Trackers for CVE-2026-45205

vendor priority summary link
debian unimportant CVE-2026-45205 unimportant priority: Debian including 2 source packages (commons-configuration, commons-configuration2), 10 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): open 5, resolved 5. https://security-tracker.debian.org/tracker/CVE-2026-45205
suse high CVE-2026-45205 severity important: SUSE including 1 source package names (apache-commons-configuration), 9 product×package rows across 9 product lines (SUSE Linux Enterprise High Performance Computing 15 SP4-LTSS, SUSE Linux Enterprise High Performance Computing 15 SP5-LTSS, … (9 product lines)): Known Not Affected 9. https://www.suse.com/security/cve/CVE-2026-45205/
ubuntu medium CVE-2026-45205 medium priority: Ubuntu including 2 source packages (commons-configuration, commons-configuration2), 15 status rows across 8 suites (bionic, focal, jammy, noble, questing, resolute, trusty, upstream): needs-triage 14, not-affected 1. https://ubuntu.com/security/CVE-2026-45205

Affected software / configurations for CVE-2026-45205

Vendor Product Version Raw CPE
apache commons_configuration >= 2.2, < 2.15.0 cpe:2.3:a:apache:commons_configuration:*:*:*:*:*:*:*:*

References for CVE-2026-45205

cvelogic Threat Intelligence