{"id":"CVE-2020-8252","url":"https://www.cyber-defence.io/tools/cve/CVE-2020-8252","generatedAt":"2026-10-27T22:25:53.355Z","title":"The implementation of realpath in libuv < 10.22.1, < 12.18.4, and < 14.9.0 used within Node.js incorrectly determined the buffer size which can result in a buffer overflow if the resolved path is longer than 256 bytes.","description":"The implementation of realpath in libuv < 10.22.1, < 12.18.4, and < 14.9.0 used within Node.js incorrectly determined the buffer size which can result in a buffer overflow if the resolved path is longer than 256 bytes.","published":"2020-09-18T21:15:13.000Z","lastModified":"2026-06-17T03:26:08.000Z","status":"Modified","sourceIdentifier":"support@hackerone.com","cvss":{"version":"3.1","score":7.8,"severity":"HIGH","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H"},"cwe":["CWE-120"],"affected":["nodejs/node.js","opensuse/leap","fedoraproject/fedora"],"epss":{"score":0.00714,"percentile":0.53432,"date":"2026-10-26","history":[]},"kev":{"listed":false},"exploits":{"count":0,"verified":false,"firstPublished":null,"source":"Exploit-DB (https://gitlab.com/exploit-database/exploitdb)","entries":[]},"verdict":{"level":"high","text":"High impact if exploited, but EPSS currently rates exploitation as unlikely (0.71%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit."},"changes":[],"references":[{"url":"http://lists.opensuse.org/opensuse-security-announce/2020-10/msg00011.html","tags":["Third Party Advisory"],"source":"support@hackerone.com"},{"url":"http://lists.opensuse.org/opensuse-security-announce/2020-10/msg00023.html","tags":["Mailing List","Third Party Advisory"],"source":"support@hackerone.com"},{"url":"https://hackerone.com/reports/965914","tags":["Permissions Required","Third Party Advisory"],"source":"support@hackerone.com"},{"url":"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/4OOYAMJVLLCLXDTHW3V5UXNULZBBK4O6/","source":"support@hackerone.com"},{"url":"https://nodejs.org/en/blog/vulnerability/september-2020-security-releases/","tags":["Vendor Advisory"],"source":"support@hackerone.com"},{"url":"https://security.gentoo.org/glsa/202009-15","tags":["Third Party Advisory"],"source":"support@hackerone.com"},{"url":"https://security.netapp.com/advisory/ntap-20201009-0004/","tags":["Third Party Advisory"],"source":"support@hackerone.com"},{"url":"https://usn.ubuntu.com/4548-1/","tags":["Third Party Advisory"],"source":"support@hackerone.com"},{"url":"http://lists.opensuse.org/opensuse-security-announce/2020-10/msg00011.html","tags":["Third Party Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://lists.opensuse.org/opensuse-security-announce/2020-10/msg00023.html","tags":["Mailing List","Third Party Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://hackerone.com/reports/965914","tags":["Permissions Required","Third Party Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/4OOYAMJVLLCLXDTHW3V5UXNULZBBK4O6/","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://nodejs.org/en/blog/vulnerability/september-2020-security-releases/","tags":["Vendor Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://security.gentoo.org/glsa/202009-15","tags":["Third Party Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://security.netapp.com/advisory/ntap-20201009-0004/","tags":["Third Party Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://usn.ubuntu.com/4548-1/","tags":["Third Party Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2020-8252","epss":"https://www.first.org/epss/","kev":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog","exploitdb":"https://www.exploit-db.com/"},"licence":"CC BY 4.0 — link back to the CVE Explorer if you publish the results; upstream data remains subject to its own terms."}