CVE-2026-67397
Received Received - Intake

Path Traversal in Plesk Leading to Root Code Execution

Publication date: 2026-09-04

Last updated on: 2026-09-04

Assigner: HackerOne

Description
Path traversal in Plesk 18.0.79.9 and earlier and 18.0.80 through 18.0.80.5 allows local users to execute arbitrary code as root.

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Meta Information

Published
2026-09-04
Last Modified
2026-09-04
Generated
2026-09-04
AI Q&A
2026-09-04
EPSS Evaluated
N/A
NVD
CVE-2026-67397
EUVD
EUVD-2026-70851

Affected Vendors & Products

Showing 4 associated CPEs
Vendor Product Version / Range
plesk plesk to 18.0.80 (exc)
plesk plesk From 18.0.80 (inc) to 18.0.80.5 (inc)
plesk plesk 18.0.79.10
plesk plesk 18.0.80.6

Helpful Resources

Exploitability

CWE
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KEV
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CWE ID Description
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.

Attack-Flow Graph

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Executive Summary

CVE-2026-67397 is a path traversal vulnerability in Plesk versions 18.0.79.9 and earlier and 18.0.80 through 18.0.80.5. It allows local users to execute arbitrary code with root privileges on the server.

Detection Guidance

To detect this vulnerability, check the installed Plesk version on your system. Run the command 'plesk version' in the terminal. If the version is 18.0.79.9 or earlier, or between 18.0.80 and 18.0.80.5, the system is vulnerable.

Impact Analysis

An attacker with local access to a vulnerable Plesk server could exploit this flaw to gain full control of the server, including executing arbitrary commands as the root user. This could lead to complete system compromise, data theft, or disruption of services.

Compliance Impact

This vulnerability allows local users to execute arbitrary code as root, potentially leading to unauthorized access to sensitive data. Such access could violate GDPR's data protection requirements and HIPAA's safeguards for protected health information by enabling data breaches or unauthorized modifications.

Mitigation Strategies

Update to Plesk Obsidian version 18.0.79.10 or 18.0.80.6 or later to patch the vulnerability. Follow the official Plesk update process to ensure correct installation.

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