SeldonIO MLServer up to 1.6.1 environment_tarball mlserver/env.py _extract_env path traversal

Summaryinfo

A vulnerability marked as critical has been reported in SeldonIO MLServer up to 1.6.1. Affected by this vulnerability is the function _extract_env of the file mlserver/env.py of the component environment_tarball Handler. Performing a manipulation results in path traversal. This vulnerability is cataloged as CVE-2026-109156. It is possible to initiate the attack remotely. There is no exploit available. The vendor was contacted early about this disclosure but did not respond in any way.

Detailsinfo

A vulnerability classified as critical has been found in SeldonIO MLServer up to 1.6.1. This affects the function _extract_env of the file mlserver/env.py of the component environment_tarball Handler. The manipulation with an unknown input leads to a path traversal vulnerability. CWE is classifying the issue as 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. This is going to have an impact on confidentiality, integrity, and availability.

The advisory is shared at github.com. This vulnerability is uniquely identified as CVE-2026-109156. The exploitability is told to be easy. It is possible to initiate the attack remotely. No form of authentication is needed for exploitation. It demands that the victim is doing some kind of user interaction. Technical details are known, but no exploit is available. The price for an exploit might be around USD $0-$5k at the moment (estimation calculated on 10/12/2026). MITRE ATT&CK project uses the attack technique T1006 for this issue.

The vendor was contacted early about this disclosure but did not respond in any way.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Productinfo

Vendor

• SeldonIO

Name

• MLServer

Version

• 1.6.0
• 1.6.1

Website

• Product: https://github.com/SeldonIO/MLServer/

CPE 2.3info

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CPE 2.2info

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Submitinfo

Accepted

• Submit #978677: SeldonIO MLServer 1.6.1 Path Traversal (by github.com)

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

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