CVE-2026-114136 Django REST framework: JSONParser applies an attacker-named codec to the request stream
- Exploited in the wild
- Not known
- Fix
- Available
What is CVE-2026-114136?
CVE-2026-114136 is a high-severity vulnerability in encode django-rest-framework, published on 21 Oct 2026.
Official description
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.
Which versions are affected by CVE-2026-114136?
2 open source packages ship an affected version, including djangorestframework.
| Package | Affected | Fixed in |
|---|---|---|
djangorestframework PyPI | From 3.6.4 | 3.18.2 |
djangorestframework PyPI | From 3.6.4 | 3.18.2 |
How do I fix CVE-2026-114136?
Upgrade djangorestframework to 3.18.2 or later.
Is CVE-2026-114136 being exploited?
There is no known exploitation of CVE-2026-114136 in the wild and no public exploit code.
Sources
Also known as DEBIAN-CVE-2026-114136, ECHO-a271-2dee-e99c, GHSA-3547-9m27-7rxg, ROOT-APP-PYPI-CVE-2026-114136, UBUNTU-CVE-2026-114136.