{"id":"CVE-2026-109714","title":"Incorrect boundary conditions in the Layout component","summary":"Incorrect boundary conditions in the Layout component. This vulnerability was fixed in Firefox 158 and Thunderbird 158.","severity":"medium","cvss":5.4,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N","cwe":["CWE-119","CWE-193"],"vendor":"Mozilla","product":"Firefox","affected":["Firefox","Thunderbird"],"published":"2026-10-13","updated":"2026-10-15","sourceUpdated":"2026-10-15T20:17:07.330","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-109714","references":[{"url":"https://bugzilla.mozilla.org/show_bug.cgi?id=2069765","label":"security@mozilla.org"},{"url":"https://www.mozilla.org/security/advisories/mfsa2026-106/","label":"security@mozilla.org"},{"url":"https://www.mozilla.org/security/advisories/mfsa2026-109/","label":"security@mozilla.org"},{"url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-109714.json"},{"url":"https://access.redhat.com/security/cve/CVE-2026-109714"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2550398"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-109714"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-109714"},{"url":"https://www.mozilla.org/security/advisories/mfsa2026-106/#CVE-2026-109714"},{"url":"https://www.mozilla.org/security/advisories/mfsa2026-109/#CVE-2026-109714"}],"tags":["nvd","cve.org","csaf","vex","red-hat","score-dispute"],"epss":0.0021,"epssPercentile":0.11164,"ssvc":{"exploitation":"none","automatable":"no","technicalImpact":"partial","timestamp":"2026-10-15T19:53:14.814371Z"},"scores":{"nvd":5.4,"adp":5.4,"vendor":7.5},"ingestedAt":"2026-10-13T13:27:03.993Z","slug":"CVE-2026-109714","body":"## Overview\n\nIncorrect boundary conditions in the Layout component. This vulnerability was fixed in Firefox 158 and Thunderbird 158.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.\n\n## Vendor advisories\n\n- **Red Hat VEX** · Important · updated 2026-10-23 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-109714.json)","depth":"sunlit","depthScore":30,"depthScoreParts":{"impact":29.7,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[{"seq":222716,"id":"CVE-2026-109714","ts":1792097059268,"field":"cvss","old":null,"new":"5.4"},{"seq":222715,"id":"CVE-2026-109714","ts":1792097059268,"field":"severity","old":"none","new":"medium"}]}