InvenTree up to 1.2.6 Setting part/helpers.py special elements used in a template engine

Summaryinfo

A vulnerability has been found in InvenTree up to 1.2.6 and classified as problematic. This impacts an unknown function of the file part/helpers.py of the component Setting Handler. The manipulation leads to improper neutralization of special elements used in a template engine. This vulnerability is uniquely identified as CVE-2026-35477. The attack is possible to be carried out remotely. No exploit exists. The affected component should be upgraded.

Detailsinfo

A vulnerability was found in InvenTree up to 1.2.6 and classified as problematic. This issue affects an unknown part of the file part/helpers.py of the component Setting Handler. The manipulation with an unknown input leads to a improper neutralization of special elements used in a template engine vulnerability. Using CWE to declare the problem leads to CWE-1336. The product uses a template engine to insert or process externally-influenced input, but it does not neutralize or incorrectly neutralizes special elements or syntax that can be interpreted as template expressions or other code directives when processed by the engine. Impacted is confidentiality, integrity, and availability. The summary by CVE is:

InvenTree is an Open Source Inventory Management System. From 1.2.3 to 1.2.6, the fix for CVE-2026-27629 upgraded the PART_NAME_FORMAT validator to use jinja2.sandbox.SandboxedEnvironment. However, the actual renderer in part/helpers.py was not updated and still uses the non-sandboxed jinja2.Environment. Additionally, the validator uses a dummy Part instance with pk=None, which allows conditional template expressions to behave differently during validation versus production rendering. A staff user with settings access can craft a template that passes validation but executes arbitrary code during rendering. This issue requires access by a user with granted staff permissions. This vulnerability is fixed in 1.2.7 and 1.3.0.

It is possible to read the advisory at github.com. The identification of this vulnerability is CVE-2026-35477 since 04/02/2026. The exploitation is known to be easy. The attack may be initiated remotely. Additional levels of successful authentication are required for exploitation. Technical details of the vulnerability are known, but there is no available exploit. The attack technique deployed by this issue is T1221 according to MITRE ATT&CK.

Upgrading to version 1.2.7 eliminates this vulnerability.

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Productinfo

Name

• InvenTree

Version

• 1.2.0
• 1.2.1
• 1.2.2
• 1.2.3
• 1.2.4
• 1.2.5
• 1.2.6

Website

• Product: https://github.com/inventree/InvenTree/

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