CVE-2026-62391Network attack vector

Authenticated local-file access via Spark alias bypass

Published Jul 31, 2026 · Updated Jul 31, 2026

Path traversal in Apache Kyuubi 1.6.0 through 1.11.1 allows remote authenticated users to access disallowed local files. The session configuration filter checks prefixed Kyuubi settings but accepts equivalent unprefixed Spark file-configuration aliases, evading kyuubi.session.local.dir.allowlist. Access to a Kyuubi frontend protocol is required, and file reachability remains bounded by the Kyuubi process and Spark engine permissions.

CVSS severity8.1
High
EPSS probability0.52%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Path traversal in Apache Kyuubi 1.6.0 through 1.11.1 allows remote authenticated users to access disallowed local files. The session configuration filter checks prefixed Kyuubi settings but accepts equivalent unprefixed Spark file-configuration aliases, evading kyuubi.session.local.dir.allowlist. Access to a Kyuubi frontend protocol is required, and file reachability remains bounded by the Kyuubi process and Spark engine permissions.

The record

CVE
CVE-2026-62391
Published
Jul 31, 2026
Updated
Jul 31, 2026
Vendor
The Apache Software Foundation
Product
Apache Kyuubi
Classifications
CWE-22, CWE-27, T1005
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Jul 31, 2026CVE publishedPublication date reported by the CVE source.
  2. Jul 31, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=1.6.0 <1.12.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

The Apache Software Foundation · Apache Kyuubiversion=1.6.0 <1.12.0

Published CVSS scores

8.1CISA-ADPCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-22Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
CWE-27Path Traversal: 'dir/../../filename'
T1005Data from Local System

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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