---
title: "Django 4.2.30 release notes"
version: 4.2
locale: pl
source: https://docs.djangoproject.com/pl/4.2/releases/4.2.30/
canonical: https://djangodocs.dev/pl/4.2/releases/4.2.30/
---
# Django 4.2.30 release notes

*April 7, 2026*

Django 4.2.30 fixes one security issue with severity „moderate” and four
security issues with severity „low” in 4.2.29.

## CVE-2026-3902: ASGI header spoofing via underscore/hyphen conflation

`ASGIRequest` normalizes header names following WSGI conventions, mapping
hyphens to underscores. As a result, even in configurations where reverse
proxies carefully strip security-sensitive headers named with hyphens, such a
header could be spoofed by supplying a header named with underscores.

Under WSGI, it is the responsibility of the server or proxy to avoid ambiguous
mappings. (Django’s [`runserver`](/pl/4.2/ref/django-admin/#django-admin-runserver) was patched in [**CVE 2015-0219**](https://www.cve.org/CVERecord?id=CVE-2015-0219).) But
under ASGI, there is not the same uniform expectation, even if many proxies
protect against this under default configuration (including `nginx` via
`underscores_in_headers off;`).

Headers containing underscores are now ignored by `ASGIRequest`, matching the
behavior of [Daphne](https://pypi.org/project/daphne/), the reference server for ASGI.

This issue has severity „low” according to the [Django security policy](/pl/4.2/internals/security/#security-disclosure).

## CVE-2026-4277: Privilege abuse in `GenericInlineModelAdmin`

Add permissions on inline model instances were not validated on submission of
forged `POST` data in
[`GenericInlineModelAdmin`](/pl/4.2/ref/contrib/contenttypes/#django.contrib.contenttypes.admin.GenericInlineModelAdmin).

This issue has severity „low” according to the [Django security policy](/pl/4.2/internals/security/#security-disclosure).

## CVE-2026-4292: Privilege abuse in `ModelAdmin.list_editable`

Admin changelist forms using
[`list_editable`](/pl/4.2/ref/contrib/admin/#django.contrib.admin.ModelAdmin.list_editable) incorrectly allowed new
instances to be created via forged `POST` data.

This issue has severity „low” according to the [Django security policy](/pl/4.2/internals/security/#security-disclosure).

## CVE-2026-33033: Potential denial-of-service vulnerability in `MultiPartParser` via base64-encoded file upload

When using `django.http.multipartparser.MultiPartParser`, multipart uploads
with `Content-Transfer-Encoding: base64` that include excessive whitespace
may trigger repeated memory copying, potentially degrading performance.

This issue has severity „moderate” according to the [Django security
policy](/pl/4.2/internals/security/#security-disclosure).

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

ASGI requests with a missing or understated `Content-Length` header could
bypass the [`DATA_UPLOAD_MAX_MEMORY_SIZE`](/pl/4.2/ref/settings/#std-setting-DATA_UPLOAD_MAX_MEMORY_SIZE) limit when reading
`HttpRequest.body`, potentially loading an unbounded request body into
memory and causing service degradation.

This issue has severity „low” according to the [Django security policy](/pl/4.2/internals/security/#security-disclosure).