CVE-2026-33034
Django: SGI requests with a missing or understated `Content-Length` header could bypass the `DATA_UPLOAD_MAX_MEMORY_SIZE` limit
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.
How to fix CVE-2026-33034
To remediate CVE-2026-33034, upgrade the affected package to a fixed version below.
- —upgrade to 4.2.30 or later
- —no fix listed
- —upgrade to 6.0.4 or later
- —upgrade to 4.2.30 or later
Is CVE-2026-33034 being exploited?
Low — EPSS is 0.0%, meaning exploitation activity has not been observed at scale.
Affected packages (4)
- >= 4.2.0, < 4.2.30, >= 5.2.0, < 5.2.13, >= 6.0.0, < 6.0.4
- from 0
- >= 6.0, < 6.0.4
- >= 4.2, < 4.2.30, >= 5.2, < 5.2.13, >= 6.0, < 6.0.4
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 3.1 | HIGH7.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |