{"id":"CVE-2021-43307","aliases":["CLSA-2026-1791796134","EUVD-2022-5926","GHSA-4x5v-gmq8-25ch","ROOT-APP-NPM-CVE-2021-43307"],"status":"published","title":"Exponential ReDoS in semver-regex","description":"An exponential ReDoS (Regular Expression Denial of Service) can be triggered in the semver-regex npm package, when an attacker is able to supply arbitrary input to the test() method","severity":{"version":"3.1","score":5.9,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"medium","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-10","score":0.01558,"percentile":0.75407,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-1333"],"published":"2022-06-01T16:47:38Z","modified":"2026-10-24T10:30:32Z","fixes":[{"ecosystem":"npm","package":"semver-regex","fixed_in":["3.1.4","4.0.3"],"sources":["ghsa","osv"]},{"ecosystem":"Root:npm","package":"semver-regex","fixed_in":["2.0.0-aikido.2"],"sources":["osv"]},{"ecosystem":"Root:npm","package":"@rootio/semver-regex","fixed_in":["2.0.0-root.io.2"],"sources":["osv"]}],"affected":[{"source":"ghsa","ecosystem":"npm","package":"semver-regex","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"3.1.4"}]}]},{"source":"ghsa","ecosystem":"npm","package":"semver-regex","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"4.0.0"},{"fixed":"4.0.3"}]}]},{"source":"osv","ecosystem":"TuxCare:npm","package":"semver-regex","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"2.0.0-tuxcare.0"},{"fixed":"2.0.0-tuxcare.1"}]}],"versions":["2.0.0"],"bundled":2},{"source":"osv","ecosystem":"npm","package":"semver-regex","ranges":[{"type":"SEMVER","events":[{"introduced":"0"},{"fixed":"3.1.4"}]}]},{"source":"osv","ecosystem":"npm","package":"semver-regex","ranges":[{"type":"SEMVER","events":[{"introduced":"4.0.0"},{"fixed":"4.0.3"}]}]},{"source":"osv","ecosystem":"Root:npm","package":"semver-regex","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.0.0-aikido.2"}]}]},{"source":"osv","ecosystem":"Root:npm","package":"@rootio/semver-regex","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.0.0-root.io.2"}]}]}],"products":[{"vendor":"semver-regex","product":"semver-regex"},{"vendor":"semver-regex_project","product":"semver-regex"}],"references":[{"url":"https://research.jfrog.com/vulnerabilities/semver-regex-redos-xray-211349/","tags":["x_refsource_MISC","x_transferred","Exploit","Third Party Advisory","evidence"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2021-43307","tags":["advisory"]},{"url":"https://github.com/sindresorhus/semver-regex/commit/d8ba39a528c1027c43ab23f12eec28ca4d40dd0c","tags":["web"]},{"url":"https://github.com/advisories/GHSA-4x5v-gmq8-25ch"},{"url":"https://github.com/sindresorhus/semver-regex","tags":["package"]},{"url":"https://research.jfrog.com/vulnerabilities/semver-regex-redos-xray-211349","tags":["web"]}],"sources":{"cve":[{"id":"CVE-2021-43307","title":"Exponential ReDoS in semver-regex","description":"An exponential ReDoS (Regular Expression Denial of Service) can be triggered in the semver-regex npm package, when an attacker is able to supply arbitrary input to the test() method","status":"published","published":"2022-06-01T16:47:38.625Z","modified":"2024-09-17T00:35:50.984Z","cvss":[{"version":"3.1","score":5.9,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"medium","assessor":"cna"}],"cwes":["CWE-1333"],"updated_at":"2026-11-02T14:32:57.033395Z"}],"euvd":[{"id":"EUVD-2022-5926","description":"An exponential ReDoS (Regular Expression Denial of Service) can be triggered in the semver-regex npm package, when an attacker is able to supply arbitrary input to the test() method","status":"published","published":"2022-06-01T16:47:38Z","modified":"2024-09-17T00:35:50Z","cvss":[{"version":"3.1","score":5.9,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"medium"}],"updated_at":"2026-11-03T00:28:57.917597Z"}],"ghsa":[{"id":"GHSA-4x5v-gmq8-25ch","title":"Regular expression denial of service in semver-regex","description":"An exponential ReDoS (Regular Expression Denial of Service) can be triggered in the semver-regex npm package, when an attacker is able to supply arbitrary input to the test() method","status":"published","published":"2022-06-03T00:01:00Z","modified":"2023-07-19T19:58:14Z","cwes":["CWE-1333"],"updated_at":"2026-11-02T14:36:57.310051Z"}],"nvd":[{"id":"CVE-2021-43307","description":"An exponential ReDoS (Regular Expression Denial of Service) can be triggered in the semver-regex npm package, when an attacker is able to supply arbitrary input to the test() method","status":"published","published":"2022-06-02T14:15:30.987Z","modified":"2026-06-17T04:10:49.6Z","cvss":[{"version":"3.1","score":5.9,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"medium","assessor":"secondary"},{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high","assessor":"primary"},{"version":"2.0","score":5,"vector":"AV:N/AC:L/Au:N/C:N/I:N/A:P","level":"medium","assessor":"primary"}],"cwes":["CWE-1333"],"updated_at":"2026-11-02T14:07:06.501652Z"}],"osv":[{"id":"CVE-2021-43307","description":"An exponential ReDoS (Regular Expression Denial of Service) can be triggered in the semver-regex npm package, when an attacker is able to supply arbitrary input to the test() method","status":"published","published":"2022-06-02T14:15:30.987Z","modified":"2026-10-24T10:30:32.958212501Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high"}],"updated_at":"2026-11-02T15:44:21.877444Z"},{"id":"CLSA-2026-1791796134","title":"TuxCare security update for semver-regex (2 CVEs)","description":"TuxCare rebuilt semver-regex to address 2 CVEs. Fixed in 2.0.0-tuxcare.1.","status":"published","published":"2026-10-12T09:08:54Z","modified":"2026-10-15T09:47:39.936812498Z","updated_at":"2026-11-02T15:43:50.599064Z"},{"id":"GHSA-4x5v-gmq8-25ch","title":"Regular expression denial of service in semver-regex","description":"An exponential ReDoS (Regular Expression Denial of Service) can be triggered in the semver-regex npm package, when an attacker is able to supply arbitrary input to the test() method","status":"published","published":"2022-06-03T00:01:00Z","modified":"2026-09-10T03:49:43.854292802Z","cwes":["CWE-1333"],"updated_at":"2026-11-02T15:46:37.528068Z"},{"id":"ROOT-APP-NPM-CVE-2021-43307","title":"CVE-2021-43307 in semver-regex - Patched by Root","description":"Root has patched CVE-2021-43307 in the semver-regex package for Root:npm. Multiple fixed versions available.","status":"published","published":"2026-08-04T15:09:53Z","modified":"2026-08-09T10:15:15.254352867Z","updated_at":"2026-11-02T15:53:27.362922Z"}]}}