{"cve":"CVE-2020-36048","nvd":{"published":"2021-01-08T00:15:11.093","modified":"2026-06-17T03:14:44.730","status":"Modified","description":"Engine.IO before 4.0.0 allows attackers to cause a denial of service (resource consumption) via a POST request to the long polling transport.","cvss_v4":null,"cvss_v3":{"version":"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},"cwes":["CWE-400"],"references":["https://blog.caller.xyz/socketio-engineio-dos/","https://github.com/bcaller/kill-engine-io","https://github.com/socketio/engine.io/commit/734f9d1268840722c41219e69eb58318e0b2ac6b","https://blog.caller.xyz/socketio-engineio-dos/","https://github.com/bcaller/kill-engine-io"],"products":["socket:engine.io"],"source":"nvd","synced_at":"2026-10-19T21:12:09.559580076+00:00"},"epss":{"cve":"CVE-2020-36048","score":0.03276,"percentile":0.88424,"date":"2026-11-01"},"kev":null,"osv":[{"id":"GHSA-j4f2-536g-r55m","url":"https://osv.dev/vulnerability/GHSA-j4f2-536g-r55m","summary":"Resource exhaustion in engine.io","modified":"2025-05-29T23:06:32Z","packages":[{"ecosystem":"npm","name":"engine.io","purl":"pkg:npm/engine.io","ranges":["<3.6.0"],"fixed":["3.6.0"]}]}],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}