{"id":"CVE-2026-100823","title":"Spoofing issue in the Downloads component in Firefox for Android","summary":"Spoofing issue in the Downloads component in Firefox for Android. This vulnerability was fixed in Firefox 157.","severity":"medium","cvss":5.4,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:L","cwe":["CWE-451"],"vendor":"mozilla","product":"firefox_mobile","affected":["firefox_mobile < 157.0"],"patched":["firefox_mobile 157.0"],"published":"2026-09-29","updated":"2026-10-05","sourceUpdated":"2026-10-05T16:58:57.867","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-100823","references":[{"url":"https://bugzilla.mozilla.org/show_bug.cgi?id=2054384","label":"security@mozilla.org"},{"url":"https://www.mozilla.org/security/advisories/mfsa2026-97/","label":"security@mozilla.org"},{"url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-100823.json"},{"url":"https://access.redhat.com/security/cve/CVE-2026-100823"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2543162"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-100823"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-100823"},{"url":"https://www.mozilla.org/security/advisories/mfsa2026-97/#CVE-2026-100823"}],"tags":["nvd","cve.org","csaf","vex","red-hat","score-dispute"],"epss":0.00164,"epssPercentile":0.05519,"ssvc":{"exploitation":"none","automatable":"no","technicalImpact":"partial","timestamp":"2026-09-30T19:46:51.030163Z"},"ingestedAt":"2026-09-29T13:34:31.677Z","scores":{"nvd":5.4,"vendor":3.4},"slug":"CVE-2026-100823","body":"## Overview\n\nSpoofing issue in the Downloads component in Firefox for Android. This vulnerability was fixed in Firefox 157.\n\n## Affected\n\n- `firefox_mobile < 157.0`\n\n## Remediation\n\nUpgrade past the affected range:\n\n- `firefox_mobile 157.0`\n\n## Vendor advisories\n\n- **Red Hat VEX** · Low · updated 2026-10-16 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-100823.json)","depth":"sunlit","depthScore":30,"depthScoreParts":{"impact":29.7,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[{"seq":213979,"id":"CVE-2026-100823","ts":1790803594590,"field":"cvss","old":null,"new":"5.4"},{"seq":213978,"id":"CVE-2026-100823","ts":1790803594590,"field":"severity","old":"none","new":"medium"}]}