Vulnerability · Published Apr 7, 2026 · Assigned by DSF
CVE-2026-33034Potential denial-of-service vulnerability in ASGI requests via memory upload limit bypass
High 7.5
In plain English
A high-severity resource allocation without limits in Django from djangoproject. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.8% (higher than 57% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Official 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. ASGI requests with a missing or understated `Content-Length` header could bypass the `DATA_UPLOAD_MAX_MEMORY_SIZE` limit when reading `HttpRequest.body`, allowing remote attackers to load an unbounded request body into memory. 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 Superior for reporting this issue.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine:v3.23 | py3-django | 4.2.30-r0 | ALPINE-CVE-2026-33034 |
| Alpine:v3.24 | py3-django | 5.2.13-r0 | ALPINE-CVE-2026-33034 |
| Debian:12 | python-django | no fix listed | DEBIAN-CVE-2026-33034 |
| Debian:13 | python-django | no fix listed | DEBIAN-CVE-2026-33034 |
| Debian:14 | python-django | 3:4.2.30-1 | DEBIAN-CVE-2026-33034 |
| PyPI | django | 6.0.4 | GHSA-933h-hp56-hf7m |
| PyPI | django | 5.2.13 | GHSA-933h-hp56-hf7m |
| PyPI | django | 4.2.30 | GHSA-933h-hp56-hf7m |
| PyPI | django | 4.2.30, 5.2.13, 6.0.4 | PYSEC-2026-49 |
| Ubuntu:22.04:LTS | python-django | 2:3.2.12-2ubuntu1.26 | USN-8154-1 |
| Ubuntu:22.04:LTS | python-django | no fix listed | UBUNTU-CVE-2026-33034 |
| Ubuntu:24.04:LTS | python-django | 3:4.2.11-1ubuntu1.15 | USN-8154-1 |
| Ubuntu:24.04:LTS | python-django | 3:4.2.11-1ubuntu1.15 | UBUNTU-CVE-2026-33034 |
| Ubuntu:25.10 | python-django | 3:5.2.4-1ubuntu2.4 | UBUNTU-CVE-2026-33034 |
| Ubuntu:25.10 | python-django | 3:5.2.4-1ubuntu2.4 | USN-8154-1 |
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| djangoproject | Django | 6.0 – before 6.0.45.2 – before 5.2.134.2 – before 4.2.30 |
Weakness: CWE-770 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
References
- Django security archive vendor-advisory
- Django releases announcements mailing-list
- Django security releases issued: 6.0.4, 5.2.13, and 4.2.30 vendor-advisory