CVE-2026-45205

MEDIUMNVD 5.35.3—
EchelonGraph scoreMEDIUM confidence

Score 5.3 from GitHub Security Advisory published 2026-05-14. NVD baseline CVSS 5.3; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
5.3EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0.8%CVSS: 5.3Exploit: None knownExposed services: Not assessed

A fix is available — apply it.

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.

CVSS v3
5.3
EG Score
5.3MEDIUMmedium confidence
EG Risk
39
EG Risk 39/100

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity53% × 45%
Exploitation0% × 40%
Automatability100% × 15%
EPSS PROB
0.8%
EPSS %ILE
56th
KEV
Not listed

Published

May 14, 2026

Last Modified

May 15, 2026

Advisory Details (3)

Auto-updated Jun 16, 2026
Patch available. Sources: github_pr.
generic

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

http://www.openwall.com/lists/oss-security/2026/05/14/5
generic
https://lists.apache.org/thread/q3q3j10ohcqhs6o0rg1v7kz6kk27vtkk
github_pr

Detect and avoid processing cycles in YAML input (YAMLConfiguration)

Fix merged in apache/commons-configuration PR #634 on 2026-05-11 — awaiting tagged release

https://github.com/apache/commons-configuration/pull/634

Vendor Advisories for CVE-2026-45205(4)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Patch Availability(1)

Vendor / EcosystemFix (by version range) / PatchReleasedSource
redhatcommons-configuration22026-08-13redhat

Patches are aggregated from vendor advisories (Red Hat, Microsoft, Cisco, GitHub) and package ecosystems (OSV, GHSA). Multiple rows for the same upstream release have been deduplicated.

Affected Packages

(5 across 5 ecosystems)
Debian:11(1)
PackageVulnerable rangeFix by version rangeDependents
commons-configuration22.10.1-1 ... 2.8.0-2 (8 versions)
  • every version on: no fix on record
—
Debian:12(1)
PackageVulnerable rangeFix by version rangeDependents
commons-configuration22.10.1-1, 2.11.0-1, 2.11.0-2, 2.11.0-3, 2.8.0-2
  • every version on: no fix on record
—
Debian:13(1)
PackageVulnerable rangeFix by version rangeDependents
commons-configuration22.11.0-2, 2.11.0-3
  • every version on: no fix on record
—
Debian:14(1)
PackageVulnerable rangeFix by version rangeDependents
commons-configuration22.11.0-2, 2.11.0-3
  • every version on: no fix on record
—
Maven(1)
PackageVulnerable rangeFix by version rangeDependents
org.apache.commons:commons-configuration22.10.0 ... 2.9.0 (14 versions)
  • 2.2 up to 2.15.0: fixed in 2.15.0
—

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 7× in last 7d / 24× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

Showing the most recent 100 of 172 total refreshes for this CVE.

  1. 2026-10-10 20:00 UTCEPSS rescore
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  74. 2026-07-18 01:59 UTCOSV refresh
  75. 2026-07-16 17:03 UTCEPSS rescore

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Frequently asked(5)

What is CVE-2026-45205?
CVE-2026-45205 is a medium vulnerability published on May 14, 2026. 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,…
When was CVE-2026-45205 disclosed?
CVE-2026-45205 was first published on May 14, 2026, with the most recent update on May 15, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-45205 actively exploited?
CVE-2026-45205 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.8% probability of exploitation in the next 30 days (56th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-45205?
CVE-2026-45205 has a CVSS v3 base score of 5.3 (NVD).
How do I remediate CVE-2026-45205?
A fix for CVE-2026-45205 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-45205 are linked in the Vendor Advisories panel on this page.

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