{"cve":"CVE-2009-4630","nvd":{"published":"2010-01-29T18:30:00.887","modified":"2026-06-16T23:14:03.403","status":"Modified","description":"Mozilla Necko, as used in Firefox, SeaMonkey, and other applications, performs DNS prefetching of domain names contained in links within local HTML documents, which makes it easier for remote attackers to determine the network location of the application's user by logging DNS requests.  NOTE: the vendor disputes the significance of this issue, stating \"I don't think we necessarily need to worry about that case.\"","cvss_v4":null,"cvss_v3":null,"cwes":["CWE-200"],"references":["https://bugzilla.mozilla.org/show_bug.cgi?id=453403","https://bugzilla.mozilla.org/show_bug.cgi?id=492196","https://bugzilla.mozilla.org/show_bug.cgi?id=453403","https://bugzilla.mozilla.org/show_bug.cgi?id=492196"],"products":["mozilla:firefox","mozilla:seamonkey","mozilla:thunderbird"],"source":"nvd","synced_at":"2026-10-19T19:55:32.599380760+00:00"},"epss":{"cve":"CVE-2009-4630","score":0.01025,"percentile":0.63583,"date":"2026-10-31"},"kev":null,"osv":[],"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."]}