{"id":"CVE-2019-10773","url":"https://www.cyber-defence.io/tools/cve/CVE-2019-10773","generatedAt":"2026-10-28T22:43:55.244Z","title":"In Yarn before 1.21.1, the package install functionality can be abused to generate arbitrary symlinks on the host filesystem by using specially crafted \"bin\" keys.","description":"In Yarn before 1.21.1, the package install functionality can be abused to generate arbitrary symlinks on the host filesystem by using specially crafted \"bin\" keys. Existing files could be overwritten depending on the current user permission set.","published":"2019-12-16T20:15:14.000Z","lastModified":"2026-06-17T02:11:39.000Z","status":"Modified","sourceIdentifier":"report@snyk.io","cvss":{"version":"3.1","score":7.8,"severity":"HIGH","vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H"},"cwe":["CWE-59"],"affected":["yarnpkg/yarn"],"epss":{"score":0.01518,"percentile":0.74418,"date":"2026-10-27","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 (1.52%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit."},"changes":[],"references":[{"url":"https://access.redhat.com/errata/RHSA-2020:0475","source":"report@snyk.io"},{"url":"https://blog.daniel-ruf.de/critical-design-flaw-npm-pnpm-yarn/","tags":["Exploit","Third Party Advisory"],"source":"report@snyk.io"},{"url":"https://github.com/yarnpkg/yarn/commit/039bafd74b7b1a88a53a54f8fa6fa872615e90e7","tags":["Patch","Third Party Advisory"],"source":"report@snyk.io"},{"url":"https://github.com/yarnpkg/yarn/issues/7761#issuecomment-565493023","tags":["Exploit","Third Party Advisory"],"source":"report@snyk.io"},{"url":"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/3HIZW4NZVV5QY5WWGW2JRP3FHYKZ6ZJ5/","source":"report@snyk.io"},{"url":"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/ITY5BC63CCC647DFNUQRQ5AJDKUKUNBI/","source":"report@snyk.io"},{"url":"https://snyk.io/vuln/SNYK-JS-YARN-537806%2C","source":"report@snyk.io"},{"url":"https://access.redhat.com/errata/RHSA-2020:0475","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://blog.daniel-ruf.de/critical-design-flaw-npm-pnpm-yarn/","tags":["Exploit","Third Party Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://github.com/yarnpkg/yarn/commit/039bafd74b7b1a88a53a54f8fa6fa872615e90e7","tags":["Patch","Third Party Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://github.com/yarnpkg/yarn/issues/7761#issuecomment-565493023","tags":["Exploit","Third Party Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/3HIZW4NZVV5QY5WWGW2JRP3FHYKZ6ZJ5/","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/ITY5BC63CCC647DFNUQRQ5AJDKUKUNBI/","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://snyk.io/vuln/SNYK-JS-YARN-537806%2C","source":"af854a3a-2127-422b-91ae-364da2661108"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2019-10773","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."}