Affected: djangoproject Django

An issue was discovered in 6.0 before 6.0.4, 5.2 before 5.2.13, and 4.2 before 4.2.30. Add permissions on inline model instances were not validated on submission of forged `POST` data in `GenericInlineModelAdmin`. Earlier, unsupported Django series (such as 5.0.x, 4.1.x, and 3.2.x) were not evaluated and may also be affected. Django would like to thank N05ec@LZU-DSLab for reporting this issue.

Affected: Ubuntu:Pro:18.04:LTS: python-django, Ubuntu:Pro:20.04:LTS: python-django, Ubuntu:22.04:LTS: python-django, Ubuntu:24.04:LTS: python-django, Ubuntu:25.10: python-django

Seokchan Yoon discovered that Django incorrectly handled copying memory when parsing multipart uploads with excessive whitespace. A remote attacker could possibly use this issue to cause Django to use excessive resources, leading to a denial of service. (CVE-2026-33033)

It was discovered that Django did not enforce an upload memory size limit in the Content-Length header. A remote attacker could possibly use this issue to cause Django to use excessive resources, leading to a denial of service. This issue only affected Ubuntu 24.04 LTS and Ubuntu 25.10. (CVE-2026-33034)

Tarek Nakkouch discovered that Django incorrectly handled underscores in the ASGI headers. A remote attacker could possibly use this issue to spoof HTTP headers. This issue only affected Ubuntu 22.04 LTS, Ubuntu 24.04 LTS, and Ubuntu 25.10. (CVE-2026-3902)

It was discovered that Django incorrectly handled verification of model data created with POST requests. A remote attacker could possibly use this issue to forge new model permissions. (CVE-2026-4277, CVE-2026-4292)