{"id":"CVE-2025-6432","title":"When Multi-Account Containers was enabled, DNS requests could have bypassed a SOCKS proxy when the domain name was invalid or the SOCKS proxy was not responding","summary":"When Multi-Account Containers was enabled, DNS requests could have bypassed a SOCKS proxy when the domain name was invalid or the SOCKS proxy was not responding. This vulnerability was fixed in Firefox 140 and Thunderbird 140.","severity":"high","cvss":8.6,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:L","cwe":["CWE-200"],"vendor":"mozilla","product":"firefox","affected":["firefox < 140.0"],"patched":["firefox 140.0"],"published":"2025-06-24","updated":"2026-09-30","sourceUpdated":"2026-09-30T18:10:00.190","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2025-6432","references":[{"url":"https://bugzilla.mozilla.org/show_bug.cgi?id=1943804","label":"security@mozilla.org"},{"url":"https://www.mozilla.org/security/advisories/mfsa2025-51/","label":"security@mozilla.org"},{"url":"https://www.mozilla.org/security/advisories/mfsa2025-54/","label":"security@mozilla.org"}],"tags":["nvd"],"epss":0.0035,"epssPercentile":0.26253,"ingestedAt":"2026-09-30T18:17:24.445Z","slug":"CVE-2025-6432","body":"## Overview\n\nWhen Multi-Account Containers was enabled, DNS requests could have bypassed a SOCKS proxy when the domain name was invalid or the SOCKS proxy was not responding. This vulnerability was fixed in Firefox 140 and Thunderbird 140.\n\n## Affected\n\n- `firefox < 140.0`\n\n## Remediation\n\nUpgrade past the affected range:\n\n- `firefox 140.0`","depth":"twilight","depthScore":47,"depthScoreParts":{"impact":47.3,"likelihood":0.1,"exploitation":0,"ransomware":0},"changes":[]}