{"cve":"CVE-2017-16086","nvd":{"published":"2018-06-07T02:29:01.597","modified":"2026-06-17T01:08:46.483","status":"Modified","description":"ua-parser is a port of Browserscope's user agent parser. ua-parser is vulnerable to a ReDoS (Regular Expression Denial of Service) attack when given a specially crafted UserAgent 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/316","https://nodesecurity.io/advisories/316"],"products":["ua-parser_project:ua-parser"],"source":"nvd","synced_at":"2026-10-19T20:50:40.212176939+00:00"},"epss":{"cve":"CVE-2017-16086","score":0.09102,"percentile":0.95304,"date":"2026-10-31"},"kev":null,"osv":[{"id":"GHSA-pmg9-p9r2-6q87","url":"https://osv.dev/vulnerability/GHSA-pmg9-p9r2-6q87","summary":"ReDoS via long UserAgent header in ua-parser","modified":"2023-11-08T03:59:04.001707Z","packages":[{"ecosystem":"npm","name":"ua-parser","purl":"pkg:npm/ua-parser","ranges":["<=0.3.5"],"fixed":[]}]}],"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."]}