CVE-2026-33033
Received
Received - Intake
Denial of Service via MultipartParser Base64 Uploads in Django
Publication date: 2026-04-07
Last updated on: 2026-04-13
Assigner: Django Software Foundation
Description
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.
CVSS Scores
EPSS Scores
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Meta Information
Affected Vendors & Products
| Vendor | Product | Version / Range |
|---|---|---|
| djangoproject | django | From 4.2 (inc) to 4.2.30 (exc) |
| djangoproject | django | From 5.2 (inc) to 5.2.13 (exc) |
| djangoproject | django | From 6.0 (inc) to 6.0.4 (exc) |
Helpful Resources
Exploitability
CWE
KEV
| CWE ID | Description |
|---|---|
| CWE-407 | An algorithm in a product has an inefficient worst-case computational complexity that may be detrimental to system performance and can be triggered by an attacker, typically using crafted manipulations that ensure that the worst case is being reached. |
