CVE-2019-10773

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.

• CWE-59

• https://access.redhat.com/errata/RHSA-2020:0475
• https://blog.daniel-ruf.de/critical-design-flaw-npm-pnpm-yarn/Exploit, Third Party Advisory
• https://github.com/yarnpkg/yarn/commit/039bafd74b7b1a88a53a54f8fa6fa872615e90e7Patch, Third Party Advisory
• https://github.com/yarnpkg/yarn/issues/7761#issuecomment-565493023Exploit, Third Party Advisory
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/3HIZW4NZVV5QY5WWGW2JRP3FHYKZ6ZJ5/
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/ITY5BC63CCC647DFNUQRQ5AJDKUKUNBI/
• https://snyk.io/vuln/SNYK-JS-YARN-537806%2C
• https://access.redhat.com/errata/RHSA-2020:0475
• https://blog.daniel-ruf.de/critical-design-flaw-npm-pnpm-yarn/Exploit, Third Party Advisory
• https://github.com/yarnpkg/yarn/commit/039bafd74b7b1a88a53a54f8fa6fa872615e90e7Patch, Third Party Advisory
• https://github.com/yarnpkg/yarn/issues/7761#issuecomment-565493023Exploit, Third Party Advisory
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/3HIZW4NZVV5QY5WWGW2JRP3FHYKZ6ZJ5/
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/ITY5BC63CCC647DFNUQRQ5AJDKUKUNBI/
• https://snyk.io/vuln/SNYK-JS-YARN-537806%2C

Published

Dec 16, 2019

Last Modified

Jun 17, 2026

Status

Modified

• How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
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