{"id":"CVE-2023-22796","aliases":["GHSA-j6gc-792m-qgm2"],"url":"https://o3.security/vulnerability/CVE-2023-22796","summary":"ReDoS based DoS vulnerability in Active Support's underscore","details":"A regular expression based DoS vulnerability in Active Support <6.1.7.1 and <7.0.4.1. A specially crafted string passed to the underscore method can cause the regular expression engine to enter a state of catastrophic backtracking. This can cause the process to use large amounts of CPU and memory, leading to a possible DoS vulnerability.","published":"2023-02-09T20:15:11.487Z","modified":"2026-03-15T22:45:49.283186Z","cvss":{"score":7.5,"severity":"HIGH","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"},"epss":null,"cisaKev":null,"exploitsKnown":0,"affectedPackages":[{"ecosystem":"RubyGems","name":"activesupport","fixedVersion":"6.1.7.1"},{"ecosystem":"RubyGems","name":"activesupport","fixedVersion":"7.0.4.1"}],"fix":null,"references":[{"type":"ADVISORY","url":"https://www.debian.org/security/2023/dsa-5372"},{"type":"ADVISORY","url":"https://security.netapp.com/advisory/ntap-20240202-0009/"},{"type":"FIX","url":"https://discuss.rubyonrails.org/t/cve-2023-22796-possible-redos-based-dos-vulnerability-in-active-supports-underscore/82116"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-03-15T22:45:49.283186Z"}}