Resource exhaustion in Encode Django-Rest-Framework
CVE-2026-114138
Django REST framework is a toolkit for building Web APIs. Prior to 3.18.2, DefaultContentNegotiation.get_accept_list in rest_framework/negotiation.py accepts an unbounded number and aggregate size of Accept tokens, while select_renderer in that file repeatedly invokes _MediaType parsing from rest_framework/utils/mediatypes.py for each attacker-controlled token, every renderer, and forced 406 renegotiation. A remote unauthenticated client can send many distinct media types containing large quoted parameter values with numerous semicolons, causing Django's parameter parser and DRF's repeated parsing structure to consume disproportionate CPU. Requests to any reachable endpoint can pin synchronous workers for prolonged periods, and concurrent requests can make the service unavailable until the requests stop. This issue is fixed in version 3.18.2.
Vulnerability class: DoS (Denial of Service)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.
EPSS exploit prediction
No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.
Affected products
- Encode Django-Rest-Framework — versions < 3.18.2
Weakness classification (CWE)
References
Frequently asked questions
- What is CVE-2026-114138?
- CVE-2026-114138 is a high-severity vulnerability in Encode Django-Rest-Framework, classified under Uncontrolled Resource Consumption. CVSS score: 7.5/10. Published 2026-10-21.
- How severe is CVE-2026-114138?
- High severity. CVSS v3 base score is 7.5 out of 10.