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CVE-2025-66518

Apache Kyuubi: Unauthorized directory access due to missing path normalization

HIGH
8.8
CVSS Score
Published: January 5, 2026 at 08:46 AM UTC
Updated: October 7, 2026 at 11:10 AM UTC
1 product affected across 1 vendorKyuubi

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Severity
HIGH8.8
Exploit prediction
EPSS 1.0%
SSVC
No known exploit

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.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Kyuubi· Apachemaven
95%
1.6.0 ≤ v ≤ 1.10.21.6.0
Affected range stops below 1.10.3, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

Patch and advisory references

References (2)

Vendor AdvisoryMailing List
Source: cverecord
https://lists.apache.org/thread/xp460bwbyzdhho34ljd4nchyt2fmhodl
Mailing ListThird Party Advisory
Source: af854a3a-2127-422b-91ae-364da2661108
http://www.openwall.com/lists/oss-security/2026/01/05/1

SSVC — Action Prioritization

SSVCNo known exploitNot automatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

8.8HIGHapache
Vector?

Quick Info

StatusANALYZED
CWE
CWE-27CWE-22

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