{"id":"CVE-2021-23449","aliases":["EUVD-2021-2254","GHSA-rjf2-j2r6-q8gr","SNYK-JS-VM2-1585918"],"status":"published","title":"Sandbox Bypass","description":"This affects the package vm2 before 3.9.4 via a Prototype Pollution attack vector, which can lead to execution of arbitrary code on the host machine.","severity":{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:P","level":"critical","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-10","score":0.0359,"percentile":0.89528,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-1321","CWE-915"],"published":"2021-10-18T16:40:13Z","modified":"2026-10-20T10:53:37Z","fixes":[{"ecosystem":"npm","package":"vm2","fixed_in":["3.9.4"],"sources":["ghsa","osv"]}],"affected":[{"source":"ghsa","ecosystem":"npm","package":"vm2","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"3.9.4"}]}]},{"source":"osv","ecosystem":"npm","package":"vm2","ranges":[{"type":"SEMVER","events":[{"introduced":"0"},{"fixed":"3.9.4"}]}]}],"products":[{"vendor":"patriksimek","product":"vm2"},{"vendor":"vm2_project","product":"vm2"}],"references":[{"url":"https://snyk.io/vuln/SNYK-JS-VM2-1585918","tags":["x_refsource_MISC","x_transferred","Exploit","Third Party Advisory","evidence","web"]},{"url":"https://github.com/patriksimek/vm2/issues/363","tags":["x_refsource_MISC","x_transferred","Third Party Advisory","advisory","web"]},{"url":"https://github.com/patriksimek/vm2/commit/b4f6e2bd2c4a1ef52fc4483d8e35f28bc4481886","tags":["x_refsource_MISC","x_transferred","Patch","Third Party Advisory","fix","web"]},{"url":"https://github.com/patriksimek/vm2/releases/tag/3.9.4","tags":["x_refsource_MISC","x_transferred","Release Notes","Third Party Advisory","advisory","web"]},{"url":"https://security.netapp.com/advisory/ntap-20211029-0010/","tags":["x_refsource_CONFIRM","x_transferred","Third Party Advisory","advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2021-23449","tags":["advisory"]},{"url":"https://github.com/advisories/GHSA-rjf2-j2r6-q8gr"},{"url":"https://github.com/patriksimek/vm2","tags":["package"]},{"url":"https://security.netapp.com/advisory/ntap-20211029-0010","tags":["web"]}],"sources":{"cve":[{"id":"CVE-2021-23449","title":"Sandbox Bypass","description":"This affects the package vm2 before 3.9.4 via a Prototype Pollution attack vector, which can lead to execution of arbitrary code on the host machine.","status":"published","published":"2021-10-18T16:40:13.749Z","modified":"2024-09-17T01:46:09.662Z","cvss":[{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:P","level":"critical","assessor":"cna"}],"updated_at":"2026-11-02T14:33:00.819444Z"}],"euvd":[{"id":"EUVD-2021-2254","description":"This affects the package vm2 before 3.9.4 via a Prototype Pollution attack vector, which can lead to execution of arbitrary code on the host machine.","status":"published","published":"2021-10-18T16:40:13Z","modified":"2024-09-17T01:46:09Z","cvss":[{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:P","level":"critical"}],"updated_at":"2026-11-03T00:28:46.561775Z"}],"ghsa":[{"id":"GHSA-rjf2-j2r6-q8gr","title":"Prototype Pollution in vm2","description":"This affects the package vm2 before 3.9.4. 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