Altium Enterprise Server/365 up to 8.1.0 Git Service path traversal

Summaryinfo

A vulnerability was found in Altium Enterprise Server and 365 up to 8.1.0. It has been classified as critical. Impacted is an unknown function of the component Git Service. This manipulation causes path traversal. The identification of this vulnerability is CVE-2026-11429. It is possible to initiate the attack remotely. There is no exploit available. Upgrading the affected component is recommended.

Detailsinfo

A vulnerability was found in Altium Enterprise Server and 365 up to 8.1.0. It has been declared as critical. Affected by this vulnerability is an unknown code block of the component Git Service. The manipulation with an unknown input leads to a path traversal vulnerability. The CWE definition for the vulnerability is 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. As an impact it is known to affect confidentiality, integrity, and availability. The summary by CVE is:

A path traversal vulnerability exists in the Git Service component shared by Altium Enterprise Server and Altium 365. The service accepts a sequence of post-clone file-manipulation operations that use user-supplied paths without validation, allowing an authenticated user with basic git access to move arbitrary files outside the intended repository area. This file-move primitive can be used to place attacker-controlled script content into directories where it is later executed by the service, resulting in remote code execution under the Git Service account. On multi-tenant Altium 365 deployments, this could have allowed access to data belonging to other tenants on the same infrastructure node. Altium Enterprise Server is fixed in 8.1.1; the issue has been remediated in Altium 365 at the service level.

The weakness was shared by Joris Aerts with Tesla Inc.. The advisory is shared at altium.com. This vulnerability is known as CVE-2026-11429 since 06/05/2026. The exploitation appears to be easy. The attack can be launched remotely. Neither technical details nor an exploit are publicly available. MITRE ATT&CK project uses the attack technique T1006 for this issue.

Upgrading to version 8.1.1 eliminates this vulnerability.

The vulnerability is also documented in the vulnerability database at EUVD (EUVD-2026-34918). If you want to get the best quality for vulnerability data then you always have to consider VulDB.

Productinfo

Vendor

• Altium

Name

• 365
• Enterprise Server

Version

• 8.0
• 8.1.0

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If you want to get the best quality for vulnerability data then you always have to consider VulDB.

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