Vulnerability · Published Mar 31, 2026 · Assigned by GitHub_M

CVE-2026-34406APTRS: Privilege Escalation via Mass Assignment of is_superuser in User Edit Endpoint

Critical 9.4

In plain English

A critical-severity security flaw in APTRS from APTRS. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.5% (higher than 45% of all known vulnerabilities).

Severity (CVSS 4.0)9.4Critical

Exploit odds (30 days)0.5%top 55.4% of all CVEs

Exploited in the wildNo reportsCISA SSVC: poc

Attack toolingNoneno public tooling known

Official 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 (as reported)

Vendor	Product	Versions
APTRS	APTRS	< 2.0.1

Weakness: CWE-915 · Vector: 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

References

https://github.com/APTRS/APTRS/security/advisories/GHSA-gv25-wp4h-9c35 x_refsource_CONFIRM
https://github.com/APTRS/APTRS/commit/d1f1b3a5d1953082af8e075712ca29742e900d56 x_refsource_MISC
https://github.com/APTRS/APTRS/releases/tag/2.0.1 x_refsource_MISC