CVE-2026-127075
Received Received - Intake

Path Traversal in OpsTree BuildPiper Before 2.7.0

Publication date: 2026-11-13

Last updated on: 2026-11-13

Assigner: VulnCheck

Description
OpsTree BuildPiper before 2.7.0 contains a path traversal vulnerability that allows authenticated users to read arbitrary files by supplying traversal sequences in Additional Manifest file paths. Attackers can enter paths like ../../../../etc/passwd so the renderer embeds file contents in generated manifests and logs, exposing configuration files and service-account tokens.

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Meta Information

Published
2026-11-13
Last Modified
2026-11-13
Generated
2026-11-13
AI Q&A
2026-11-13
EPSS Evaluated
N/A
NVD
CVE-2026-127075
EUVD
EUVD-2026-125107

Affected Vendors & Products

Showing 1 associated CPE
Vendor Product Version / Range
OpsTree Solutions BuildPiper From 0 (inc) to 2.7.0 (exc)

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.

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Executive Summary

CVE-2026-127075 is a path traversal vulnerability in OpsTree BuildPiper versions before 2.7.0. It allows authenticated users to read arbitrary files on the server by inserting path traversal sequences like ../../../../etc/passwd into Additional Manifest file paths. The renderer embeds the contents of these files into generated manifests and logs, exposing sensitive data such as configuration files and service-account tokens.

Detection Guidance

Check BuildPiper version with command: buildpiper --version. If version is below 2.7.0, the system is vulnerable. Inspect logs for manifest generation errors or file read attempts containing paths like ../../../../etc/passwd.

Impact Analysis

An attacker could exploit this to access sensitive files like configuration files, SSH keys, service-account tokens, or application secrets. This could lead to unauthorized data exposure, privilege escalation, or further compromise of the system. The impact depends on the files accessible and the permissions of the BuildPiper service.

Compliance Impact

This vulnerability could lead to unauthorized access to sensitive data, violating compliance requirements under GDPR (data protection) and HIPAA (health information privacy). Exposure of configuration files or tokens may result in data breaches, triggering regulatory penalties, fines, or legal consequences depending on the affected data.

Mitigation Strategies

Upgrade BuildPiper to version 2.7.0 or later immediately. Disable the Additional Manifest feature if not required. Implement strict path validation to reject traversal sequences like ../ in file paths.

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