CVE-2026-44615: Path traversal in NotebookRepo note and folder path composition

Severity: medium (CVSS 6.5 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.8% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-07-31 · updated 2026-10-23
Weakness: CWE-22

Description

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.

Affected products

Apache Software Foundation Apache Zeppelin: from 0.9.0 before 0.12.1 — fixed in 0.12.1

How to fix

Upgrade to a fixed version: Apache Software Foundation Apache Zeppelin 0.12.1. Check the vendor advisory for mitigations.

References

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