{"cve":"CVE-2019-16201","nvd":{"published":"2019-11-26T18:15:15.100","modified":"2026-06-17T02:21:53.007","status":"Modified","description":"WEBrick::HTTPAuth::DigestAuth in Ruby through 2.4.7, 2.5.x through 2.5.6, and 2.6.x through 2.6.4 has a regular expression Denial of Service cause by looping/backtracking. A victim must expose a WEBrick server that uses DigestAuth to the Internet or a untrusted network.","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-287"],"references":["http://lists.opensuse.org/opensuse-security-announce/2020-03/msg00041.html","https://hackerone.com/reports/661722","https://lists.debian.org/debian-lts-announce/2019/11/msg00025.html","https://lists.debian.org/debian-lts-announce/2019/12/msg00009.html","https://lists.debian.org/debian-lts-announce/2020/08/msg00027.html"],"products":["debian:debian_linux","ruby-lang:ruby"],"source":"nvd","synced_at":"2026-10-19T20:59:27.069234358+00:00"},"epss":{"cve":"CVE-2019-16201","score":0.05086,"percentile":0.92349,"date":"2026-10-31"},"kev":null,"osv":[],"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."]}