CVE-2026-114136

Django REST framework: JSONParser applies an attacker-named codec to the request stream

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

encode · django-rest-framework

CVSS v3.1 GITHUB

7.5 HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

EPSS

0.50% chance of exploitation in the next 30 days, 43rd percentile

Published

2026-10-21

Updated

2026-10-30

Proof-of-concept exploits (1)

• advisories/GHSA-3547-9m27-7rxgsnapshot

CVE references

• encode/django-rest-framework/commit/3c2634599b26a9f789b03045118dbc276117611aREFERENCE
• encode/django-rest-framework/releases/tag/3.18.2REFERENCE
• encode/django-rest-framework/security/advisories/GHSA-3547-9m27-7rxgREFERENCE

References

• CVE Record
• NVD entry