{"id":"CVE-2023-28756","aliases":["BIT-ruby-2023-28756","BIT-ruby-min-2023-28756","GHSA-fg7x-g82r-94qc"],"url":"https://o3.security/vulnerability/CVE-2023-28756","summary":"Ruby Time component ReDoS issue","details":"A ReDoS issue was discovered in the Time component through 0.2.1 in Ruby through 3.2.1. The Time parser mishandles invalid URLs that have specific characters. It causes an increase in execution time for parsing strings to Time objects. The fixed versions are 0.1.1 and 0.2.2.","published":"2023-03-31T00:00:00Z","modified":"2026-08-12T03:51:46.353985719Z","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":"time","fixedVersion":"0.2.2"},{"ecosystem":"RubyGems","name":"time","fixedVersion":"0.1.1"}],"fix":null,"references":[{"type":"WEB","url":"https://github.com/ruby/time/releases/"},{"type":"WEB","url":"https://lists.debian.org/debian-lts-announce/2024/09/msg00000.html"},{"type":"WEB","url":"https://www.ruby-lang.org/en/downloads/releases/"},{"type":"WEB","url":"https://www.ruby-lang.org/en/news/2022/12/25/ruby-3-2-0-released/"},{"type":"WEB","url":"https://www.ruby-lang.org/en/news/2023/03/30/redos-in-time-cve-2023-28756/"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/28xxx/CVE-2023-28756.json"},{"type":"ADVISORY","url":"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/FFZANOQA4RYX7XCB42OO3P24DQKWHEKA/"},{"type":"ADVISORY","url":"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/G76GZG3RAGYF4P75YY7J7TGYAU7Z5E2T/"},{"type":"ADVISORY","url":"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/WMIOPLBAAM3FEQNAXA2L7BDKOGSVUT5Z/"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2023-28756"},{"type":"ADVISORY","url":"https://security.gentoo.org/glsa/202401-27"},{"type":"ADVISORY","url":"https://security.netapp.com/advisory/ntap-20230526-0004/"},{"type":"ARTICLE","url":"https://lists.debian.org/debian-lts-announce/2023/04/msg00033.html"},{"type":"WEB","url":"https://www.ruby-lang.org/en/news/2023/03/30/redos-in-time-cve-2023-28756"},{"type":"WEB","url":"https://www.ruby-lang.org/en/news/2022/12/25/ruby-3-2-0-released"},{"type":"WEB","url":"https://www.ruby-lang.org/en/downloads/releases"},{"type":"WEB","url":"https://security.netapp.com/advisory/ntap-20230526-0004"},{"type":"WEB","url":"https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/WMIOPLBAAM3FEQNAXA2L7BDKOGSVUT5Z"},{"type":"WEB","url":"https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/G76GZG3RAGYF4P75YY7J7TGYAU7Z5E2T"},{"type":"WEB","url":"https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/FFZANOQA4RYX7XCB42OO3P24DQKWHEKA"},{"type":"WEB","url":"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/WMIOPLBAAM3FEQNAXA2L7BDKOGSVUT5Z"},{"type":"WEB","url":"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/G76GZG3RAGYF4P75YY7J7TGYAU7Z5E2T"},{"type":"WEB","url":"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/FFZANOQA4RYX7XCB42OO3P24DQKWHEKA"},{"type":"WEB","url":"https://github.com/rubysec/ruby-advisory-db/blob/master/gems/time/CVE-2023-28756.yml"},{"type":"WEB","url":"https://github.com/ruby/time/releases"},{"type":"PACKAGE","url":"https://github.com/ruby/time"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-08-12T03:51:46.353985719Z"}}