What’s Vulnerable › Vulnerabilities

CVE-2026-33034: Potential denial-of-service vulnerability in ASGI requests via memory upload limit bypass

• Severity: high (CVSS 7.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.8% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-04-07 · updated 2026-10-26
• Weakness: CWE-770

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 products

• Django: from 4.2 before 4.2.30; from 5.2 before 5.2.13; from 6.0 before 6.0.4 — fixed in 4.2.30, 5.2.13, 6.0.4

How to fix

Upgrade to a fixed version: Django 4.2.30, 5.2.13, 6.0.4. Check the vendor advisory for mitigations.

References

• https://docs.djangoproject.com/en/dev/releases/security/
• https://groups.google.com/g/django-announce
• https://www.djangoproject.com/weblog/2026/apr/07/security-releases/

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