How severe is CVE-2026-45205?

CVE-2026-45205 has a CVSS 3.x base score of 5.3, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability low.

Is CVE-2026-45205 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (38th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-45205?

CVE-2026-45205 affects Apache Commons Configuration. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-45205?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

Does CVE-2026-45205 have an EU (EUVD) identifier?

Yes. CVE-2026-45205 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-30267.

When was CVE-2026-45205 published?

CVE-2026-45205 was published on 2026-05-14 and last updated on 2026-06-17.

CVE-2026-45205

CVE-2026-45205 is a medium-severity vulnerability in Apache Commons Configuration with a CVSS 3.x base score of 5.3. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-674.

Key facts

Severity: Medium (CVSS 3.x base score 5.3)
EPSS exploit prediction: 0% (38th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-30267
Weakness: CWE-674
Affected product: Apache Commons Configuration
Published: 2026-05-14
Last modified: 2026-06-17

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.

Frequently asked questions

What is 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.
How severe is CVE-2026-45205?: CVE-2026-45205 has a CVSS 3.x base score of 5.3, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability low.
Is CVE-2026-45205 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (38th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-45205?: CVE-2026-45205 affects Apache Commons Configuration. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-45205?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2026-45205 have an EU (EUVD) identifier?: Yes. CVE-2026-45205 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-30267.
When was CVE-2026-45205 published?: CVE-2026-45205 was published on 2026-05-14 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:apache:commons_configuration:*:*:*:*:*:*:*:*

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