CVE-2026-33033
Potential denial-of-service vulnerability in MultiPartParser via base64-encoded file upload
MEDIUM 6.5EPSS 0.9%
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
- djangoproject · Django
- CVSS v3.1 CNA
- 6.5 MEDIUM
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H - EPSS
- 0.88% chance of exploitation in the next 30 days, 58th percentile
- Published
- 2026-04-07
Proof-of-concept exploits (1)
- ch4n3-yoon/CVE-2026-33033-PoC2★ · 2026-04-10
Security advisories
- https://docs.djangoproject.com/en/dev/releases/security
- https://www.djangoproject.com/weblog/2026/apr/07/security-releases
- advisories/GHSA-5mf9-h53q-7mhq
- https://groups.google.com/g/django-announce