{"cve":"CVE-2017-16136","nvd":{"published":"2018-06-07T02:29:03.770","modified":"2026-06-17T01:08:51.410","status":"Modified","description":"method-override is a module used by the Express.js framework to let you use HTTP verbs such as PUT or DELETE in places where the client doesn't support it. method-override is vulnerable to a regular expression denial of service vulnerability when specially crafted input is passed in to be parsed via the X-HTTP-Method-Override header.","cvss_v4":null,"cvss_v3":{"version":"3.0","vector":"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","score":7.5},"cwes":["CWE-400"],"references":["https://nodesecurity.io/advisories/538","https://nodesecurity.io/advisories/538"],"products":["expressjs:method-override"],"source":"nvd","synced_at":"2026-10-19T20:50:40.212176939+00:00"},"epss":{"cve":"CVE-2017-16136","score":0.01196,"percentile":0.68083,"date":"2026-10-31"},"kev":null,"osv":[{"id":"GHSA-qx2f-477c-35rq","url":"https://osv.dev/vulnerability/GHSA-qx2f-477c-35rq","summary":"method-override ReDoS when untrusted user input passed into X-HTTP-Method-Override header","modified":"2023-11-08T03:59:06.980734Z","packages":[{"ecosystem":"npm","name":"method-override","purl":"pkg:npm/method-override","ranges":[">=1.0.2 <2.3.10"],"fixed":["2.3.10"]},{"ecosystem":"npm","name":"method-override","purl":"pkg:npm/method-override","ranges":[">=2.0.0 <2.3.10"],"fixed":["2.3.10"]}]}],"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."]}