{"id":"CVE-2021-23406","aliases":["GHSA-9j49-mfvp-vmhm"],"url":"https://o3.security/vulnerability/CVE-2021-23406","summary":"Code Injection in pac-resolver","details":"This affects the package pac-resolver before 5.0.0. This can occur when used with untrusted input, due to unsafe PAC file handling. **NOTE:** The fix for this vulnerability is applied in the node-degenerator library, a dependency written by the same maintainer.","published":"2021-08-24T08:15:18.180Z","modified":"2026-07-08T22:13:53.672277Z","cvss":{"score":9.8,"severity":"CRITICAL","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"},"epss":null,"cisaKev":null,"exploitsKnown":2,"affectedPackages":[{"ecosystem":"npm","name":"pac-resolver","fixedVersion":"5.0.0"},{"ecosystem":"npm","name":"degenerator","fixedVersion":"3.0.1"}],"fix":{"url":"https://github.com/TooTallNate/node-degenerator/commit/9d25bb67d957bc2e5425fea7bf7a58b3fc64ff9e","label":"TooTallNate/node-degenerator@9d25bb6"},"references":[{"type":"FIX","url":"https://github.com/TooTallNate/node-degenerator/commit/9d25bb67d957bc2e5425fea7bf7a58b3fc64ff9e"},{"type":"FIX","url":"https://github.com/TooTallNate/node-degenerator/commit/ccc3445354135398b6eb1a04c7d27c13b833f2d5"},{"type":"FIX","url":"https://github.com/TooTallNate/node-pac-resolver/releases/tag/5.0.0"},{"type":"FIX","url":"https://snyk.io/vuln/SNYK-JAVA-ORGWEBJARSNPM-1568506"},{"type":"FIX","url":"https://snyk.io/vuln/SNYK-JS-PACRESOLVER-1564857"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-07-08T22:13:53.672277Z"}}