Django Security Multiple Issues

Unauthenticated attackers can bypass add permissions in Django GenericInlineModelAdmin (versions 6.0 <6.0.4, 5.2 <5.2.13, 4.2 <4.2.30) by submitting forged POST data to inline model forms. Permission checks fail to validate creation rights on inline model instances, enabling unauthorized database record insertion with network access alone. CVSS 9.8 critical severity reflects complete confidentiality, integrity, and availability impact. No public exploit identified at time of analysis. Low observed exploitation activity (EPSS 0.01%).

Unbounded memory consumption in Django ASGI applications allows unauthenticated remote attackers to bypass DATA_UPLOAD_MAX_MEMORY_SIZE protections via malformed Content-Length headers, leading to denial of service. Affects Django 6.0 before 6.0.4, 5.2 before 5.2.13, and 4.2 before 4.2.30. CVSS 7.5 (High) with network-accessible, low-complexity attack vector requiring no privileges. EPSS data not available; no public exploit identified at time of analysis. Vendor patches released April 2026 across all affected major branches.

Header spoofing in Django 4.2 through 6.0 allows remote attackers to bypass security controls by exploiting ambiguous ASGI header normalization. The ASGIRequest handler incorrectly maps both hyphenated and underscored header variants to the same underscored version, enabling attackers to send conflicting headers where the malicious version overwrites legitimate security headers. Affects Django 6.0 before 6.0.4, 5.2 before 5.2.13, and 4.2 before 4.2.30. No public exploit identified at time of analysis. EPSS data not available, but the unauthenticated network attack vector and high integrity impact warrant immediate patching.

Django's MultiPartParser allows authenticated remote attackers to cause denial of service through performance degradation by submitting multipart uploads with Content-Transfer-Encoding: base64 and excessive whitespace. Affected versions include Django 6.0 before 6.0.4, 5.2 before 5.2.13, and 4.2 before 4.2.30, with unsupported series 5.0.x, 4.1.x, and 3.2.x potentially also vulnerable. The vulnerability has a CVSS 6.5 score reflecting high availability impact but requires authentication (PR:L) and is not actively exploited or publicly weaponized at analysis time.

Django admin changelist forms with ModelAdmin.list_editable enabled allow high-privileged users to create new instances via forged POST requests, bypassing intended access controls. Affects Django 6.0 before 6.0.4, 5.2 before 5.2.13, and 4.2 before 4.2.30; unsupported versions 5.0.x, 4.1.x, and 3.2.x may also be vulnerable. The vulnerability requires admin-level privileges and results in unauthorized data modification rather than data exposure or availability impact. No public exploit code or active exploitation has been confirmed at time of analysis.