{"cve":"CVE-2020-36049","nvd":{"published":"2021-01-08T00:15:11.187","modified":"2026-06-17T03:14:44.860","status":"Modified","description":"socket.io-parser before 3.4.1 allows attackers to cause a denial of service (memory consumption) via a large packet because a concatenation approach is used.","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-770"],"references":["https://blog.caller.xyz/socketio-engineio-dos/","https://github.com/bcaller/kill-engine-io","https://github.com/socketio/socket.io-parser/commit/dcb942d24db97162ad16a67c2a0cf30875342d55","https://blog.caller.xyz/socketio-engineio-dos/","https://github.com/bcaller/kill-engine-io"],"products":["socket:socket.io-parser"],"source":"nvd","synced_at":"2026-10-19T21:12:09.559580076+00:00"},"epss":{"cve":"CVE-2020-36049","score":0.02671,"percentile":0.85762,"date":"2026-10-31"},"kev":null,"osv":[{"id":"GHSA-xfhh-g9f5-x4m4","url":"https://osv.dev/vulnerability/GHSA-xfhh-g9f5-x4m4","summary":"Resource exhaustion in socket.io-parser","modified":"2023-11-08T04:03:40.136588Z","packages":[{"ecosystem":"npm","name":"socket.io-parser","purl":"pkg:npm/socket.io-parser","ranges":["<3.3.2"],"fixed":["3.3.2"]},{"ecosystem":"npm","name":"socket.io-parser","purl":"pkg:npm/socket.io-parser","ranges":[">=3.4.0 <3.4.1"],"fixed":["3.4.1"]}]}],"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."]}