{"id":"CVE-2026-114138","revision":null,"records":[{"revision":"9c9ffd62a8144a5aa24fcab91a366417","observedAt":"2026-10-28T19:46:48.975+00:00","statement":{"source":"cve-program","id":"CVE-2026-114138","aliases":[],"title":"Django REST framework: Accept header with many large quoted parameters burns ~19s of CPU per request in content negotiation","description":"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.","state":0,"publishedAt":"2026-10-21T20:09:06.489+00:00","modifiedAt":"2026-10-28T18:11:30.554+00:00","affected":[{"ecosystem":"Vendor product","name":"django-rest-framework","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"vendor\": \"encode\",\n                    \"product\": \"django-rest-framework\",\n                    \"versions\": [\n                        {\n                            \"version\": \"< 3.18.2\",\n                            \"status\": \"affected\"\n                        }\n                    ]\n                }"}],"metrics":[{"system":"CVSS 3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","score":7.5,"severity":"HIGH"}],"references":["https://github.com/encode/django-rest-framework/security/advisories/GHSA-33wh-fxxf-88vv","https://github.com/encode/django-rest-framework/commit/148ab6523922d5a0c110f76615935e5220b63029","https://github.com/encode/django-rest-framework/releases/tag/3.18.2"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-114138","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-114138","identifiers":["CVE-2026-114138"]},"retained":false,"historicalAffected":[]}],"coverage":[{"source":"cisa-kev:global","scope":"Complete CISA KEV catalog; all vendors. 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Not a global EUVD catalog. Successful not-found lookups count as checked; they do not imply withdrawal or safety. No reader inventory is sent.","generation":"enrichment-37424cd879ca4a05bdc9f10401730dc6","complete":false,"records":13632,"lastAttemptAt":"2026-11-07T10:41:04.1691786+00:00","lastSuccessAt":"2026-11-07T10:41:04.165+00:00","error":"4 identifier lookups failed; latest failures include HTTP 403. Other identifiers were checked independently.","lastVerifiedAt":"2026-11-07T10:41:04.165+00:00","snapshotPublishedAt":null,"importing":false,"stagedRecords":0,"checkedIdentifiers":13530,"expectedIdentifiers":13685,"failedIdentifiers":4},{"source":"first-epss:nuget","scope":"FIRST EPSS for explicit CVE aliases in the collected public NuGet archive. Not a global EPSS backfill.","generation":"2026-11-07T10:29:02.4913618+00:00","complete":true,"records":1096,"lastAttemptAt":"2026-11-07T10:29:02.4913618+00:00","lastSuccessAt":"2026-11-07T10:29:02.6477615+00:00","error":null,"lastVerifiedAt":"2026-11-07T10:29:02.6477618+00:00","snapshotPublishedAt":null,"importing":false,"stagedRecords":0,"checkedIdentifiers":null,"expectedIdentifiers":null,"failedIdentifiers":null},{"source":"nvd","scope":"Rolling NVD lookups of CVE aliases in current public OSV archives; 500 identifiers per refresh, rechecked after 48 hours. Not a global NVD catalog. Successful not-found lookups count as checked; they do not imply withdrawal or safety. No reader inventory is sent.","generation":"enrichment-1262a9fa83024e28a1560dfc0c9cdf3c","complete":true,"records":13645,"lastAttemptAt":"2026-11-07T10:29:03.4827106+00:00","lastSuccessAt":"2026-11-07T06:27:08.533+00:00","error":null,"lastVerifiedAt":"2026-11-07T06:27:08.533+00:00","snapshotPublishedAt":null,"importing":false,"stagedRecords":0,"checkedIdentifiers":13685,"expectedIdentifiers":13685,"failedIdentifiers":0},{"source":"osv:Go","scope":"Complete OSV Go ecosystem archive, including withdrawn and malicious-package source records; statement counts are not unique CVE counts","generation":"go-0eb4d6dde62dffacd040ad992d4fd5a65cd7d0dc5f5f4cfa8b41967fc6f9ca5f","complete":true,"records":9914,"lastAttemptAt":"2026-11-07T10:29:02.0800599+00:00","lastSuccessAt":"2026-11-06T20:10:36.6450506+00:00","error":null,"lastVerifiedAt":"2026-11-07T10:29:02.0800599+00:00","snapshotPublishedAt":"2026-11-06T20:02:57+00:00","importing":false,"stagedRecords":0,"checkedIdentifiers":null,"expectedIdentifiers":null,"failedIdentifiers":null},{"source":"osv:NuGet","scope":"Complete OSV NuGet ecosystem archive, including GitHub Advisory Database records; NuGet version matching only","generation":"nuget-fde804134ecdda0ddd5ff5c26ee1fff5a6fa659311f7ef2e51c6ad54964db0e2","complete":true,"records":1971,"lastAttemptAt":"2026-11-07T10:26:54.3037111+00:00","lastSuccessAt":"2026-11-06T19:03:17.0399903+00:00","error":null,"lastVerifiedAt":"2026-11-07T10:26:54.3037111+00:00","snapshotPublishedAt":"2026-11-06T18:17:57+00:00","importing":false,"stagedRecords":0,"checkedIdentifiers":null,"expectedIdentifiers":null,"failedIdentifiers":null},{"source":"osv:crates.io","scope":"Complete OSV crates.io ecosystem archive, including withdrawn and malicious-package source records; statement counts are not unique CVE counts","generation":"crates.io-335633e78a15c9cde10a6025895b5617717087fb945489ae7e15d377bacf34a9","complete":true,"records":3055,"lastAttemptAt":"2026-11-07T10:29:02.4591941+00:00","lastSuccessAt":"2026-11-06T16:03:00.7615789+00:00","error":null,"lastVerifiedAt":"2026-11-07T10:29:02.4591941+00:00","snapshotPublishedAt":"2026-11-06T16:02:48+00:00","importing":false,"stagedRecords":0,"checkedIdentifiers":null,"expectedIdentifiers":null,"failedIdentifiers":null},{"source":"osv:npm","scope":"Complete OSV npm ecosystem archive, including withdrawn and malicious-package source records; statement counts are not unique CVE counts","generation":"npm-40ad6183a951565ace1520a9b4d631e1d0bfb1d4bf7c5574c375032559f3ff53","complete":true,"records":231292,"lastAttemptAt":"2026-11-07T10:29:01.9187831+00:00","lastSuccessAt":"2026-11-07T10:29:00.4821259+00:00","error":null,"lastVerifiedAt":"2026-11-07T10:29:01.9187831+00:00","snapshotPublishedAt":"2026-11-07T09:32:47+00:00","importing":false,"stagedRecords":0,"checkedIdentifiers":null,"expectedIdentifiers":null,"failedIdentifiers":null}]}