How severe is CVE-2026-102497?

CVE-2026-102497 has a CVSS 3.x base score of 7.5, rated high 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 high.

Is CVE-2026-102497 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (28th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-102497?

CVE-2026-102497 affects Apache Xmlschema. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-102497?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

When was CVE-2026-102497 published?

CVE-2026-102497 was published on 2026-09-29 and last updated on 2026-10-06.

CVE-2026-102497

CVE-2026-102497 is a high-severity vulnerability in Apache Xmlschema with a CVSS 3.x base score of 7.5. 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: High (CVSS 3.x base score 7.5)
EPSS exploit prediction: 0% (28th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-674
Affected product: Apache Xmlschema
Published: 2026-09-29
Last modified: 2026-10-06

Description

The Apache XmlSchema walker (xmlschema-walker) doesn't detect cycles in type derivation, substitution groups, model groups or attribute groups. A malicious schema with such a cycle can make the walker recurse until the stack overflows, causing a denial of service. Users are recommended to upgrade to version 2.3.3, which fixes this issue.

Frequently asked questions

What is CVE-2026-102497?: The Apache XmlSchema walker (xmlschema-walker) doesn't detect cycles in type derivation, substitution groups, model groups or attribute groups. A malicious schema with such a cycle can make the walker recurse until the stack overflows, causing a denial of service. Users are recommended to upgrade to version 2.3.3, which fixes this issue.
How severe is CVE-2026-102497?: CVE-2026-102497 has a CVSS 3.x base score of 7.5, rated high 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 high.
Is CVE-2026-102497 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (28th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-102497?: CVE-2026-102497 affects Apache Xmlschema. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-102497?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2026-102497 published?: CVE-2026-102497 was published on 2026-09-29 and last updated on 2026-10-06.

References

Affected products (1)

cpe:2.3:a:apache:xmlschema:*:*:*:*:*:*:*:*

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