Executive Summary

CVE-2026-35476 is a high-severity privilege escalation vulnerability in InvenTree versions prior to 1.2.7 and 1.3.0. It occurs because the user account API endpoint has improperly configured write permissions, allowing any authenticated non-staff user to elevate their account privileges to staff level by sending a specially crafted POST request.

Exploitation requires valid user authentication but involves low attack complexity and no user interaction.

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Impact Analysis

This vulnerability allows an authenticated non-staff user to escalate their privileges to staff level, which can lead to unauthorized access to sensitive functions or data within the InvenTree system.

The impact affects confidentiality and integrity at a low level but does not affect system availability.

Because the scope is changed, the elevated privileges can potentially allow the attacker to perform actions reserved for staff users, compromising the security of the system.

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Detection Guidance

This vulnerability can be detected by monitoring for POST requests to the user account API endpoint that attempt to change the staff status of a user. Specifically, look for authenticated non-staff users sending crafted POST requests that modify their own staff privileges.

Commands to detect such activity would involve inspecting web server logs or using network monitoring tools to filter POST requests targeting the user account endpoint with parameters related to staff status changes.

• Use tools like curl or HTTP request log analysis to identify suspicious POST requests modifying staff status.
• Example command to search logs for POST requests to the user account endpoint (assuming logs are in access.log):
• grep 'POST /api/user' access.log | grep 'staff=true'
• Use network monitoring tools like Wireshark or tcpdump to capture and analyze HTTP POST traffic to the user account API endpoint.

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Mitigation Strategies

The immediate and recommended mitigation is to upgrade InvenTree to version 1.2.7 or 1.3.0, where this vulnerability has been fixed.

No workarounds are available, so patching is the only effective mitigation.

Additionally, restrict access to the user account API endpoint to trusted users only, if possible, until the upgrade can be applied.

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Compliance Impact

The vulnerability allows a non-staff authenticated user to elevate their privileges to staff level, impacting confidentiality and integrity at a low level. This unauthorized privilege escalation could potentially lead to unauthorized access to sensitive data or system functions.

Such unauthorized access and privilege escalation may conflict with compliance requirements in standards and regulations like GDPR and HIPAA, which mandate strict controls on access to personal and sensitive data to protect confidentiality and integrity.

However, the provided information does not explicitly discuss the direct impact on compliance with these standards or any specific regulatory implications.

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