What is CVE-2026-62391?

CVE-2026-62391 is a high-severity vulnerability in Apache Kyuubi, classified under Path Traversal. CVSS score: 8.1/10. Published 2026-07-31.

How severe is CVE-2026-62391?

High severity. CVSS v3 base score is 8.1 out of 10.

Path Traversal in Apache Kyuubi

CVE-2026-62391

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.

Vulnerability class: Path Traversal (Directory Traversal)

EPSS: 0.005 (42.8th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 8.1 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N.

Affected products

Apache Kyuubi
Apache Software Foundation Kyuubi — versions 1.6.0

Weakness classification (CWE)

References

security@apache.org (vendor-advisory, Mailing List, Vendor Advisory)

Frequently asked questions

What is CVE-2026-62391?: CVE-2026-62391 is a high-severity vulnerability in Apache Kyuubi, classified under Path Traversal. CVSS score: 8.1/10. Published 2026-07-31.
How severe is CVE-2026-62391?: High severity. CVSS v3 base score is 8.1 out of 10.