CVE-2026-33033: Djangoproject Django

Medium severity, CVSS 6.5. EPSS: 0.9% 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. `MultiPartParser` allows remote attackers to degrade performance by submitting multipart uploads with `Content-Transfer-Encoding: base64` including excessive whitespace. 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 Seokchan Yoon 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.