# CVE-2026-34406

## Summary

- **CVE ID:** CVE-2026-34406
- **Severity:** CRITICAL
- **CVSS Score:** 9.4 (CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H)
- **CWE:** CWE-915
- **Published:** Mar 31, 2026
- **Last Modified:** Apr 3, 2026

## Description

APTRS (Automated Penetration Testing Reporting System) is a Python and Django-based automated reporting tool designed for penetration testers and security organizations. Prior to version 2.0.1, the edit_user endpoint (POST /api/auth/edituser/<pk>) allows Any user who can reach that endpoint and submit crafted permission to escalate their own account (or any other account) to superuser by including "is_superuser": true in the request body. The root cause is that CustomUserSerializer explicitly includes is_superuser in its fields list but omits it from read_only_fields, making it a writable field. The edit_user view performs no additional validation to prevent non-superusers from modifying this field. Once is_superuser is set to true, gaining unrestricted access to all application functionality without requiring re-authentication. This issue has been patched in version 2.0.1.

## Affected Products

- APTRS — APTRS (< 2.0.1)

## References

- [CNA](https://github.com/APTRS/APTRS/security/advisories/GHSA-gv25-wp4h-9c35)
- [CNA](https://github.com/APTRS/APTRS/commit/d1f1b3a5d1953082af8e075712ca29742e900d56)
- [CNA](https://github.com/APTRS/APTRS/releases/tag/2.0.1)

## Exploitation Prediction (EPSS)

- **EPSS Score:** 0.51%
- **EPSS Percentile:** 41.5

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_Exported from OnDuty AI Vulnerability Intelligence on 2026-09-11._