{"id":"CVE-2020-12404","title":"For native-to-JS bridging the app requires a unique token to be passed that ensures non-app code can't call the bridging functions","summary":"For native-to-JS bridging the app requires a unique token to be passed that ensures non-app code can't call the bridging functions. That token could leak when used for downloading files. This vulnerability affects Firefox for iOS < 26.","severity":"medium","cvss":4.3,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N","cwe":["CWE-79"],"vendor":"mozilla","product":"firefox_mobile","affected":["firefox_mobile < 26.0"],"patched":["firefox_mobile 26.0"],"published":"2020-07-09","updated":"2026-08-19","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2020-12404","references":[{"url":"https://bugzilla.mozilla.org/show_bug.cgi?id=1631739","label":"security@mozilla.org"},{"url":"https://www.mozilla.org/security/advisories/mfsa2020-19/","label":"security@mozilla.org"},{"url":"https://bugzilla.mozilla.org/show_bug.cgi?id=1631739","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://www.mozilla.org/security/advisories/mfsa2020-19/","label":"af854a3a-2127-422b-91ae-364da2661108"}],"tags":["nvd"],"epss":0.00784,"epssPercentile":0.5455,"ingestedAt":"2026-08-19T15:41:14.205Z","slug":"CVE-2020-12404","body":"## Overview\n\nFor native-to-JS bridging the app requires a unique token to be passed that ensures non-app code can't call the bridging functions. That token could leak when used for downloading files. This vulnerability affects Firefox for iOS < 26.\n\n## Affected\n\n- `firefox_mobile < 26.0`\n\n## Remediation\n\nUpgrade past the affected range:\n\n- `firefox_mobile 26.0`","depth":"sunlit","depthScore":24,"depthScoreParts":{"impact":23.7,"likelihood":0.2,"exploitation":0,"ransomware":0},"changes":[]}