{"id":"CVE-2021-3795","aliases":["GHSA-44c6-4v22-4mhx"],"url":"https://o3.security/vulnerability/CVE-2021-3795","summary":"semver-regex Regular Expression Denial of Service (ReDOS)","details":"npm `semver-regex` is vulnerable to Inefficient Regular Expression Complexity","published":"2021-09-15T17:15:10.577Z","modified":"2026-07-08T05:57:48.519806059Z","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":{"score":0.01457,"percentile":0.71101,"asOf":"2026-08-23"},"cisaKev":null,"exploitsKnown":1,"affectedPackages":[{"ecosystem":"npm","name":"semver-regex","fixedVersion":"3.1.3"},{"ecosystem":"npm","name":"semver-regex","fixedVersion":"4.0.1"}],"fix":{"url":"https://github.com/sindresorhus/semver-regex/commit/11c66245f4e1976dccc52977ed183696a21a3fd7","label":"sindresorhus/semver-regex@11c6624"},"references":[{"type":"FIX","url":"https://github.com/sindresorhus/semver-regex/commit/11c66245f4e1976dccc52977ed183696a21a3fd7"},{"type":"FIX","url":"https://huntr.dev/bounties/006624e3-35ac-448f-aab9-7b5183f30e28"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2021-3795"},{"type":"PACKAGE","url":"https://github.com/sindresorhus/semver-regex"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-07-08T05:57:48.519806059Z"}}