CVE-2026-33033

MEDIUM 6.5

Potential denial-of-service vulnerability in MultiPartParser via base64-encoded file upload

CVSS Score

6.5

EPSS Score

0.0%

EPSS Percentile

0th

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.

CWE	CWE-407
Vendor	djangoproject
Product	django
Published	Apr 7, 2026
Last Updated	Apr 7, 2026

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Affected Versions

djangoproject / Django

6.0 < 6.0.4 5.2 < 5.2.13 4.2 < 4.2.30

References

NVD ↗ CVE.org ↗ EPSS Data ↗

docs.djangoproject.com: https://docs.djangoproject.com/en/dev/releases/security/ groups.google.com: https://groups.google.com/g/django-announce djangoproject.com: https://www.djangoproject.com/weblog/2026/apr/07/security-releases/

Credits

🔍 Seokchan Yoon Natalia Bidart Jacob Walls