What is CVE-2025-66518?

CVE-2025-66518 is a high-severity vulnerability in Apache Kyuubi, classified under CWE-27. CVSS score: 8.8/10. Published 2026-01-05.

How severe is CVE-2025-66518?

High severity. CVSS v3 base score is 8.8 out of 10.

Path Traversal in Apache Kyuubi

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.

Published 2026-01-05 · last modified 2026-10-07.

CVSS v3 metric

CVSS v3 base score 8.8 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.010 (62.0th percentile), scored 2026-10-19.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 62nd percentile — 62.0% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.011 · newest: 0.010 · change: -0.001

Affected products

Apache Kyuubi
Apache Software Foundation Kyuubi — versions 1.6.0

Weakness classification (CWE)

References

lists.apache.org/thread/xp460bwbyzdhho34ljd4nchyt2fmhodl (vendor-advisory, Mailing List)
af854a3a-2127-422b-91ae-364da2661108 (Mailing List, Third Party Advisory)

Frequently asked questions

What is CVE-2025-66518?: CVE-2025-66518 is a high-severity vulnerability in Apache Kyuubi, classified under CWE-27. CVSS score: 8.8/10. Published 2026-01-05.
How severe is CVE-2025-66518?: High severity. CVSS v3 base score is 8.8 out of 10.