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CVE-2026-62391— Apache Kyuubi: kyuubi.session.local.dir.allow.list bypass via unprefixed Spark file-conf aliases

Quick assessment

Affected
Apache Software Foundation Apache Kyuubi
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Apache kyuubi是美国Apache基金会开源的一个分布式SQL查询引擎。 Apache Kyuubi 1.6.0版本至1.12.0之前版本存在路径遍历漏洞，该漏洞源于对CVE-2025-66518的修复不完整，任何可通过Kyuubi前端协议访问服务器的客户端能够利用未加前缀的Spark配置别名绕过服务端配置kyuubi.session.local.dir.allowlist，可能导致路径遍历。

AI Predicted 7.5 Difficulty: Moderate EPSS 0.52% · P43

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application

Affected Version Matrix 1

VendorProduct Version RangeStatus
Apache Software Foundation Apache Kyuubi 1.6.0< 1.12.0 affected
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I. Basic Information for CVE-2026-62391

Vulnerability Information
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Vulnerability Title
Apache Kyuubi: kyuubi.session.local.dir.allow.list bypass via unprefixed Spark file-conf aliases
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
对路径名的限制不恰当(路径遍历)
Source: CVE Program / CVE List V5
Vulnerability Title
Apache Kyuubi 路径遍历漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Apache kyuubi是美国Apache基金会开源的一个分布式SQL查询引擎。 Apache Kyuubi 1.6.0版本至1.12.0之前版本存在路径遍历漏洞，该漏洞源于对CVE-2025-66518的修复不完整，任何可通过Kyuubi前端协议访问服务器的客户端能够利用未加前缀的Spark配置别名绕过服务端配置kyuubi.session.local.dir.allowlist，可能导致路径遍历。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
Apache Software Foundation Apache Kyuubi 1.6.0 ~ 1.12.0 -

II. Public POCs for CVE-2026-62391

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III. Intelligence Information for CVE-2026-62391

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Mailing List Discussions for CVE-2026-62391 (1)

Same Patch Batch · Apache Software Foundation · 2026-07-31 · 3 CVEs total

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IV. Related Vulnerabilities

Same product: Apache Kyuubi
Same vendor: Apache Software Foundation
Same weakness: CWE-22

V. Comments for CVE-2026-62391

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