CVE-2026-109156
Received Received - Intake

Path Traversal in SeldonIO MLServer

Publication date: 2026-10-13

Last updated on: 2026-10-13

Assigner: VulDB

Description
A vulnerability has been found in SeldonIO MLServer up to 1.6.1. Affected is the function _extract_env of the file mlserver/env.py of the component environment_tarball Handler. Such manipulation leads to path traversal. The attack may be performed from remote. The vendor was contacted early about this disclosure but did not respond in any way.

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Meta Information

Published
2026-10-13
Last Modified
2026-10-13
Generated
2026-10-13
AI Q&A
2026-10-13
EPSS Evaluated
N/A
NVD
CVE-2026-109156
EUVD
EUVD-2026-98452

Affected Vendors & Products

Showing 2 associated CPEs
Vendor Product Version / Range
SeldonIO MLServer 1.6.0
SeldonIO MLServer 1.6.1

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-2026-109156 is a path traversal vulnerability in SeldonIO MLServer versions up to 1.6.1. It exists in the _extract_env function of the mlserver/env.py file, specifically in the environment_tarball Handler component. An attacker can manipulate this function to perform path traversal attacks from a remote location.

Detection Guidance

Check if MLServer version 1.6.1 or earlier is installed by running pip show mlserver or mlserver --version. Inspect the mlserver/env.py file for the _extract_env function to verify if path traversal vulnerabilities exist in environment tarball handling.

Impact Analysis

This vulnerability allows remote attackers to access unauthorized files or directories on the server. It could lead to data breaches, unauthorized code execution, or disruption of MLServer services. The impact depends on the server's configuration and the attacker's goals.

Compliance Impact

This vulnerability could lead to non-compliance with GDPR and HIPAA by exposing sensitive data. GDPR requires protection of personal data, while HIPAA mandates safeguards for protected health information. A breach could result in legal penalties, fines, and reputational damage.

Mitigation Strategies

Upgrade MLServer to a version beyond 1.6.1 if available. If no patch exists, disable the environment tarball handler in MLServer configurations. Monitor the MLServer GitHub repository for updates or patches from the vendor.

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