CVE-2026-4277: Djangoproject Django

Critical severity, CVSS 9.8. EPSS: 0.6% chance of exploitation in the next 30 days.

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 products

• Djangoproject Django: from 4.2, before 4.2.30 (fixed in 4.2.30); from 5.2, before 5.2.13 (fixed in 5.2.13); from 6.0, before 6.0.4 (fixed in 6.0.4)

Published 2026-04-07. Last modified 2026-06-17.