{"id":"CVE-2021-23413","aliases":["GHSA-jg8v-48h5-wgxg"],"url":"https://o3.security/vulnerability/CVE-2021-23413","summary":"jszip Vulnerable to Prototype Pollution","details":"This affects the package jszip before 3.7.0. Crafting a new zip file with filenames set to Object prototype values (e.g __proto__, toString, etc) results in a returned object with a modified prototype instance.","published":"2021-07-25T13:15:07.390Z","modified":"2026-07-08T21:27:01.368119Z","cvss":{"score":5.3,"severity":"MEDIUM","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L"},"epss":null,"cisaKev":null,"exploitsKnown":3,"affectedPackages":[{"ecosystem":"npm","name":"jszip","fixedVersion":"3.7.0"},{"ecosystem":"npm","name":"jszip","fixedVersion":"2.7.0"}],"fix":{"url":"https://github.com/Stuk/jszip/commit/22357494f424178cb416cdb7d93b26dd4f824b36","label":"Stuk/jszip@2235749"},"references":[{"type":"WEB","url":"https://github.com/Stuk/jszip/blob/master/lib/object.js%23L88"},{"type":"ADVISORY","url":"https://github.com/Stuk/jszip/pull/766"},{"type":"FIX","url":"https://github.com/Stuk/jszip/commit/22357494f424178cb416cdb7d93b26dd4f824b36"},{"type":"FIX","url":"https://snyk.io/vuln/SNYK-JAVA-ORGWEBJARS-1251499"},{"type":"FIX","url":"https://snyk.io/vuln/SNYK-JAVA-ORGWEBJARSNPM-1251498"},{"type":"FIX","url":"https://snyk.io/vuln/SNYK-JS-JSZIP-1251497"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-07-08T21:27:01.368119Z"}}