{"id":"CVE-2026-40879","revision":"a9e5eff51f2246fbbf897858ddf5418d","records":[{"revision":"a9e5eff51f2246fbbf897858ddf5418d","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-40879","aliases":[],"title":"Nest: DoS via Recursive handleData in JsonSocket (TCP Transport)","description":"Nest is a framework for building scalable Node.js server-side applications. Prior to 11.1.19, when an attacker sends many small, valid JSON messages in one TCP frame, handleData() recurses once per message; the buffer shrinks each call. maxBufferSize is never reached; call stack overflows instead. A ~47 KB payload is sufficient to trigger RangeError. This vulnerability is fixed in 11.1.19.","state":0,"publishedAt":"2026-04-21T19:14:17.894+00:00","modifiedAt":"2026-04-21T19:38:04.805+00:00","affected":[{"ecosystem":"Vendor product","name":"nest","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"vendor\": \"nestjs\",\n                    \"product\": \"nest\",\n                    \"versions\": [\n                        {\n                            \"version\": \"< 11.1.19\",\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/nestjs/nest/security/advisories/GHSA-hpwf-8g29-85qm"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-40879","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-40879","identifiers":["CVE-2026-40879"]},"retained":false,"historicalAffected":[]}],"coverage":[]}