{"id":"CVE-2025-8036","title":"Thunderbird cached CORS preflight responses across IP address changes","summary":"Thunderbird cached CORS preflight responses across IP address changes. This allowed circumventing CORS with DNS rebinding. This vulnerability was fixed in Firefox 141, Firefox ESR 140.1, Thunderbird 141, and Thunderbird 140.1.","severity":"high","cvss":8.1,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N","cwe":["CWE-350"],"vendor":"mozilla","product":"firefox","affected":["firefox < 140.1.0","firefox < 141.0","thunderbird < 140.1.0","thunderbird < 141.0"],"patched":["firefox 141.0","thunderbird 141.0"],"published":"2025-07-22","updated":"2026-09-30","sourceUpdated":"2026-09-30T18:10:00.190","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2025-8036","references":[{"url":"https://bugzilla.mozilla.org/show_bug.cgi?id=1960834","label":"security@mozilla.org"},{"url":"https://www.mozilla.org/security/advisories/mfsa2025-56/","label":"security@mozilla.org"},{"url":"https://www.mozilla.org/security/advisories/mfsa2025-59/","label":"security@mozilla.org"},{"url":"https://www.mozilla.org/security/advisories/mfsa2025-61/","label":"security@mozilla.org"},{"url":"https://www.mozilla.org/security/advisories/mfsa2025-63/","label":"security@mozilla.org"},{"url":"https://www.kb.cert.org/vuls/id/652514","label":"af854a3a-2127-422b-91ae-364da2661108"}],"tags":["nvd"],"epss":0.00424,"epssPercentile":0.34343,"ingestedAt":"2026-09-30T18:17:24.449Z","slug":"CVE-2025-8036","body":"## Overview\n\nThunderbird cached CORS preflight responses across IP address changes. This allowed circumventing CORS with DNS rebinding. This vulnerability was fixed in Firefox 141, Firefox ESR 140.1, Thunderbird 141, and Thunderbird 140.1.\n\n## Affected\n\n- `firefox < 140.1.0`\n- `firefox < 141.0`\n- `thunderbird < 140.1.0`\n- `thunderbird < 141.0`\n\n## Remediation\n\nUpgrade past the affected range:\n\n- `firefox 141.0`\n- `thunderbird 141.0`","depth":"twilight","depthScore":45,"depthScoreParts":{"impact":44.6,"likelihood":0.1,"exploitation":0,"ransomware":0},"changes":[]}