{"cve":"CVE-2009-4629","nvd":{"published":"2010-01-29T18:30:00.840","modified":"2026-06-16T23:14:03.297","status":"Modified","description":"Mozilla Necko, as used in Thunderbird 3.0.1, SeaMonkey, and other applications, performs DNS prefetching even when the app type is APP_TYPE_MAIL or APP_TYPE_EDITOR, which makes it easier for remote attackers to determine the network location of the application's user by logging DNS requests, as demonstrated by DNS requests triggered by reading text/plain e-mail messages in Thunderbird.","cvss_v4":null,"cvss_v3":null,"cwes":["CWE-200"],"references":["https://bugzilla.mozilla.org/show_bug.cgi?id=492196","https://secure.grepular.com/DNS_Prefetch_Exposure_on_Thunderbird_and_Webmail","https://bugzilla.mozilla.org/show_bug.cgi?id=492196","https://secure.grepular.com/DNS_Prefetch_Exposure_on_Thunderbird_and_Webmail"],"products":["mozilla:seamonkey","mozilla:thunderbird"],"source":"nvd","synced_at":"2026-10-19T19:55:32.599380760+00:00"},"epss":{"cve":"CVE-2009-4629","score":0.00934,"percentile":0.60767,"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."]}