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

Quick assessment

Affected
djangoproject Django
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Django是Django基金会的一套基于Python语言的开源Web应用框架。该框架包括面向对象的映射器、视图系统、模板系统等。 Django 6.0.4之前版本、5.2.13之前版本和4.2.30之前版本存在安全漏洞，该漏洞源于缺少或低估Content-Length标头的ASGI请求可能绕过DATA_UPLOAD_MAX_MEMORY_SIZE限制，可能导致远程攻击者将无限请求体加载到内存中。

AI Predicted 7.5 Difficulty: Easy EPSS 0.85% · P57

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application
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I. Basic Information for CVE-2026-33034

Vulnerability Information
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Vulnerability Title
Potential denial-of-service vulnerability in ASGI requests via memory upload limit bypass
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
不加限制或调节的资源分配
Source: CVE Program / CVE List V5
Vulnerability Title
Django 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Django是Django基金会的一套基于Python语言的开源Web应用框架。该框架包括面向对象的映射器、视图系统、模板系统等。 Django 6.0.4之前版本、5.2.13之前版本和4.2.30之前版本存在安全漏洞，该漏洞源于缺少或低估Content-Length标头的ASGI请求可能绕过DATA_UPLOAD_MAX_MEMORY_SIZE限制，可能导致远程攻击者将无限请求体加载到内存中。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
djangoproject Django 6.0 ~ 6.0.4 -

II. Public POCs for CVE-2026-33034

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III. Intelligence Information for CVE-2026-33034

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Vendor Advisories for CVE-2026-33034 (2)

Mailing List Discussions for CVE-2026-33034 (1)

Same Patch Batch · djangoproject · 2026-04-07 · 5 CVEs total

CVE-2026-3902 ASGI header spoofing via underscore/hyphen conflation
CVE-2026-4292 Privilege abuse in ModelAdmin.list_editable
CVE-2026-4277 Privilege abuse in GenericInlineModelAdmin
CVE-2026-33033 Potential denial-of-service vulnerability in MultiPartParser via base64-encoded file uploa

IV. Related Vulnerabilities

Same product: Django
Same vendor: djangoproject
Same weakness: CWE-770

V. Comments for CVE-2026-33034

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