---
id: CVE-2026-114136
title: >-
  Django REST framework: JSONParser applies an attacker-named codec to the
  request stream
summary: >-
  Django REST framework is a toolkit for building Web APIs. From 3.6.4 until
  3.18.2, JSONParser.parse in rest_framework/parsers.py uses the client-supplied
  Content-Type charset value with codecs.getreader, which accepts byte-transform
  code…
severity: high
cvss: 7.5
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H'
cvssSource: cna
cwe:
  - CWE-409
  - CWE-770
vendor: encode
product: django-rest-framework
affected:
  - 'django-rest-framework >= 3.6.4, < 3.18.2'
published: '2026-10-21'
updated: '2026-10-21'
sourceUpdated: '2026-10-21T20:02:41.030Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-114136'
references:
  - url: >-
      https://github.com/encode/django-rest-framework/security/advisories/GHSA-3547-9m27-7rxg
    label: >-
      https://github.com/encode/django-rest-framework/security/advisories/GHSA-3547-9m27-7rxg
  - url: >-
      https://github.com/encode/django-rest-framework/commit/3c2634599b26a9f789b03045118dbc276117611a
    label: >-
      https://github.com/encode/django-rest-framework/commit/3c2634599b26a9f789b03045118dbc276117611a
  - url: 'https://github.com/encode/django-rest-framework/releases/tag/3.18.2'
    label: 'https://github.com/encode/django-rest-framework/releases/tag/3.18.2'
tags:
  - cve.org
ingestedAt: '2026-10-21T20:11:44.901Z'
---

## Overview

Django REST framework is a toolkit for building Web APIs. From 3.6.4 until 3.18.2, JSONParser.parse in rest_framework/parsers.py uses the client-supplied Content-Type charset value with codecs.getreader, which accepts byte-transform codecs such as bz2_codec rather than only text encodings. A remote unauthenticated client can therefore cause a compressed JSON request body to be expanded after Django has enforced DATA_UPLOAD_MAX_MEMORY_SIZE against only the wire bytes, allowing a very small request to consume substantial per-worker memory. The default parser set is sufficient, and any reachable endpoint that accepts a JSON body is affected. This issue is fixed in version 3.18.2.

## Affected

- `django-rest-framework >= 3.6.4, < 3.18.2`

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.