{"cve":"CVE-2021-23406","nvd":{"published":"2021-08-24T08:15:18.180","modified":"2026-06-17T03:38:42.293","status":"Modified","description":"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.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","score":9.8},"cwes":[],"references":["https://github.com/TooTallNate/node-degenerator/commit/9d25bb67d957bc2e5425fea7bf7a58b3fc64ff9e","https://github.com/TooTallNate/node-degenerator/commit/ccc3445354135398b6eb1a04c7d27c13b833f2d5","https://github.com/TooTallNate/node-pac-resolver/releases/tag/5.0.0","https://snyk.io/vuln/SNYK-JAVA-ORGWEBJARSNPM-1568506","https://snyk.io/vuln/SNYK-JS-PACRESOLVER-1564857"],"products":["pac-resolver_project:pac-resolver"],"source":"nvd","synced_at":"2026-10-19T21:21:57.125947417+00:00"},"epss":{"cve":"CVE-2021-23406","score":0.02943,"percentile":0.87138,"date":"2026-10-31"},"kev":null,"osv":[{"id":"GHSA-9j49-mfvp-vmhm","url":"https://osv.dev/vulnerability/GHSA-9j49-mfvp-vmhm","summary":"Code Injection in pac-resolver","modified":"2025-01-14T09:12:24.964432Z","packages":[{"ecosystem":"npm","name":"pac-resolver","purl":"pkg:npm/pac-resolver","ranges":["<5.0.0"],"fixed":["5.0.0"]},{"ecosystem":"npm","name":"degenerator","purl":"pkg:npm/degenerator","ranges":["<3.0.1"],"fixed":["3.0.1"]}]}],"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."]}