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CVE-2026-62391

Apache Kyuubi path traversal

8.1 HIGHEPSS 0.79%
  1. Published31 Jul 2026

Description

The security fix for CVE-2025-66518 is incomplete. Any client who can access to Apache Kyuubi Server via Kyuubi frontend protocols can bypass server-side config kyuubi.session.local.dir.allowlist via unprefixed Spark config aliases. This issue affects Apache Kyuubi: from 1.6.0 before 1.12.0. Users are recommended to upgrade to version 1.12.0, which fixes the issue.

CVSS 3.1 breakdown

Attack vectorNetwork
Attack complexityLow
Privileges requiredLow
User interactionNone
ScopeUnchanged
ConfidentialityHigh
IntegrityHigh
AvailabilityNone
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N

Affected products

Apache Kyuubi≥ 1.6.0 < 1.12.0

Remediation

Fixed in
Apache Kyuubi≥ 1.12.0

References

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Frequently asked

Is CVE-2026-62391 being actively exploited?

CVE-2026-62391 is not in the CISA KEV catalog. Its EPSS exploit probability is 0.79%.

How severe is CVE-2026-62391?

CVE-2026-62391 has a CVSS 3.1 base score of 8.1, rated high. EPSS estimates a 0.79% probability of exploitation.

Which products are affected by CVE-2026-62391?

Affected products include Apache Kyuubi.

How do I fix CVE-2026-62391?

Upgrade affected software to a fixed version, for example Apache Kyuubi 1.12.0 or later, then confirm no affected versions remain in your inventory.

How Secuno handles this

Secuno correlates vulnerabilities like CVE-2026-62391 against the real software inventory on every managed device, as each hourly inventory arrives. Rather than a static severity, each match is scored in context: exploit availability, EPSS, the asset's exposure, and business criticality decide where it lands in the queue. If an affected version is present anywhere across your portfolio, it surfaces automatically with a prioritised remediation path.

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Data from the NVD, CISA KEV catalog and FIRST EPSS. CVSS 3.1 base score shown where available.