How severe is CVE-2025-66518?

CVE-2025-66518 has a CVSS 3.x base score of 8.8, rated high severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2025-66518 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (61st percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2025-66518?

CVE-2025-66518 affects Apache Kyuubi. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2025-66518?

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.

Does CVE-2025-66518 have an EU (EUVD) identifier?

Yes. CVE-2025-66518 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-0819.

When was CVE-2025-66518 published?

CVE-2025-66518 was published on 2026-01-05 and last updated on 2026-10-07.

CVE-2025-66518

CVE-2025-66518 is a high-severity vulnerability in Apache Kyuubi with a CVSS 3.x base score of 8.8. 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-22.

Key facts

Severity: High (CVSS 3.x base score 8.8)
CVSS v4: 8.8
EPSS exploit prediction: 1% (61st percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-0819
Weakness: CWE-22
Affected product: Apache Kyuubi
Published: 2026-01-05
Last modified: 2026-10-07

Description

Any client who can access to Apache Kyuubi Server via Kyuubi frontend protocols can bypass server-side config kyuubi.session.local.dir.allow.list and use local files which are not listed in the config. This issue affects Apache Kyuubi: from 1.6.0 through 1.10.2. Users are recommended to upgrade to version 1.10.3 or upper, which fixes the issue.

Frequently asked questions

What is CVE-2025-66518?: Any client who can access to Apache Kyuubi Server via Kyuubi frontend protocols can bypass server-side config kyuubi.session.local.dir.allow.list and use local files which are not listed in the config. This issue affects Apache Kyuubi: from 1.6.0 through 1.10.2. Users are recommended to upgrade to version 1.10.3 or upper, which fixes the issue.
How severe is CVE-2025-66518?: CVE-2025-66518 has a CVSS 3.x base score of 8.8, rated high severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2025-66518 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (61st percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2025-66518?: CVE-2025-66518 affects Apache Kyuubi. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2025-66518?: 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.
Does CVE-2025-66518 have an EU (EUVD) identifier?: Yes. CVE-2025-66518 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-0819.
When was CVE-2025-66518 published?: CVE-2025-66518 was published on 2026-01-05 and last updated on 2026-10-07.

References

Affected products (1)

cpe:2.3:a:apache:kyuubi:*:*:*:*:*:*:*:*

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