Apache Zeppelin up to 0.12.0 FileSystemNotebookRepo path traversal

Summaryinfo

A vulnerability marked as critical has been reported in Apache Zeppelin up to 0.12.0. Affected by this issue is some unknown functionality of the component FileSystemNotebookRepo. The manipulation leads to path traversal. This vulnerability is uniquely identified as CVE-2026-44615. The attack is possible to be carried out remotely. No exploit exists.

Detailsinfo

A vulnerability, which was classified as critical, has been found in Apache Zeppelin up to 0.12.0. This issue affects an unknown code of the component FileSystemNotebookRepo. The manipulation with an unknown input leads to a path traversal vulnerability. Using CWE to declare the problem leads to CWE-22. The product uses external input to construct a pathname that is intended to identify a file or directory that is located underneath a restricted parent directory, but the product does not properly neutralize special elements within the pathname that can cause the pathname to resolve to a location that is outside of the restricted directory. Impacted is confidentiality, integrity, and availability. The summary by CVE is:

Path traversal vulnerability in Apache Zeppelin. When FileSystemNotebookRepo is configured, an authenticated attacker with permission to rename a note, or access to folder operations, could supply traversal segments in note or folder paths.                   Zeppelin composed these values into filesystem paths using the server's filesystem or Hadoop identity without ensuring that the result remained under the configured notebook directory. This could allow notebook files or directories to be moved,                   written, or deleted outside the notebook root. This issue affects Apache Zeppelin versions 0.9.0 through 0.12.0. Users are recommended to upgrade to version 0.12.1, which fixes this issue.

It is possible to read the advisory at github.com. The identification of this vulnerability is CVE-2026-44615 since 05/07/2026. The exploitation is known to be easy. The attack may be initiated remotely. The technical details are unknown and an exploit is not publicly available. The pricing for an exploit might be around USD $0-$5k at the moment (estimation calculated on 07/31/2026). The attack technique deployed by this issue is T1006 according to MITRE ATT&CK.

Upgrading to version 0.12.1 eliminates this vulnerability.

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Productinfo

Vendor

• Apache

Name

• Zeppelin

Version

• 0.1
• 0.2
• 0.3
• 0.4
• 0.5
• 0.6
• 0.7
• 0.8
• 0.9
• 0.10
• 0.11
• 0.12.0

License

• open-source

Website

• Vendor: https://www.apache.org/
• Product: https://github.com/apache/zeppelin/

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