Vulnerability details
CVE-2026-114136
Django REST framework: JSONParser applies an attacker-named codec to the request stream
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.
CVSS scores
| Score | Version | Source | Vector |
|---|---|---|---|
| 7.5High | 3.1 | CVEProject cvelistV5 (CNA) (GitHub_M) | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |
Affected products
| Vendor | Product | Versions | Source |
|---|---|---|---|
| encode | django-rest-framework | >= 3.6.4, < 3.18.2 | CVEProject cvelistV5 (CNA) |
References and advisories
3- https://github.com/encode/django-rest-framework/commit/3c2634599b26a9f789b03045118dbc276117611a x_refsource_MISC
- https://github.com/encode/django-rest-framework/releases/tag/3.18.2 x_refsource_MISC
- https://github.com/encode/django-rest-framework/security/advisories/GHSA-3547-9m27-7rxg x_refsource_CONFIRM
Details
- Published
- 2026-10-21
- Last updated
- 2026-10-30
- State
- Published
- Assigner (CNA)
- GitHub_M
Exploit prediction (EPSS)
SSVC assessment (CISA)
- Automatable
- Yes
- Exploitation
- Proof of concept
- Technical impact
- Partial
Weaknesses (CWE)
- CWE-409Improper Handling of Highly Compressed Data (Data Amplification)
- CWE-770Allocation of Resources Without Limits or Throttling