GitHub Advisoryadvisory · PyPI
GHSA-5mf9-h53q-7mhq Django has potential DoS via MultiPartParser through crafted multipart uploads
MEDIUM
Official page ↗
- Aliases
- CVE-2026-33033
- Ecosystem
- PyPI
- Packages
- Django
- Severity
- Moderate
- CVSS vector
- CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
- Weaknesses
- CWE-407
- Reviewed
- 2026-04-08
Affected packages
• PyPI Django: >= 6.0, < 6.0.4 → fixed in 6.0.4
• PyPI Django: >= 5.2, < 5.2.13 → fixed in 5.2.13
• PyPI Django: >= 4.2, < 4.2.30 → fixed in 4.2.30
Description
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.
Related
Alias · CVE (1)
- CVE-2026-33033 An issue was discovered in 6.0 before 6.0.4, 5.2 before 5.2.13, and 4.2 before 4.2.30. vulnerability
Weakness · CWE (1)
- CWE-407 Inefficient Algorithmic Complexity weakness
References
- https://nvd.nist.gov/vuln/detail/CVE-2026-33033 advisory
- https://docs.djangoproject.com/en/dev/releases/security web
- https://github.com/django/django package
- https://github.com/pypa/advisory-database/tree/main/vulns/django/PYSEC-2026-48.yaml web
- https://groups.google.com/g/django-announce web
- https://www.djangoproject.com/weblog/2026/apr/07/security-releases web