{"cve":"CVE-2019-10773","nvd":{"published":"2019-12-16T20:15:14.477","modified":"2026-06-17T02:11:38.710","status":"Modified","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.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H","score":7.8},"cwes":["CWE-59"],"references":["https://access.redhat.com/errata/RHSA-2020:0475","https://blog.daniel-ruf.de/critical-design-flaw-npm-pnpm-yarn/","https://github.com/yarnpkg/yarn/commit/039bafd74b7b1a88a53a54f8fa6fa872615e90e7","https://github.com/yarnpkg/yarn/issues/7761#issuecomment-565493023","https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/3HIZW4NZVV5QY5WWGW2JRP3FHYKZ6ZJ5/"],"products":["yarnpkg:yarn"],"source":"nvd","synced_at":"2026-10-19T20:59:27.069234358+00:00"},"epss":{"cve":"CVE-2019-10773","score":0.01518,"percentile":0.74561,"date":"2026-10-31"},"kev":null,"osv":[{"id":"GHSA-5xf4-f2fq-f69j","url":"https://osv.dev/vulnerability/GHSA-5xf4-f2fq-f69j","summary":"Yarn Improper link resolution before file access (Link Following)","modified":"2026-09-10T03:49:25.201779354Z","packages":[{"ecosystem":"npm","name":"yarn","purl":"pkg:npm/yarn","ranges":["<1.22.0"],"fixed":["1.22.0"]}]}],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}