{"id":"CVE-2026-109715","title":"Incorrect boundary conditions in the JavaScript Engine component","summary":"Incorrect boundary conditions in the JavaScript Engine component. This vulnerability was fixed in Firefox 158, Firefox ESR 115.43, Firefox ESR 153.5, Thunderbird 158, and Thunderbird 153.5.","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-119"],"vendor":"Mozilla","product":"Firefox","affected":["Firefox","Thunderbird"],"published":"2026-10-13","updated":"2026-10-16","sourceUpdated":"2026-10-16T19:17:03.150","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-109715","references":[{"url":"https://bugzilla.mozilla.org/show_bug.cgi?id=2073267","label":"security@mozilla.org"},{"url":"https://www.mozilla.org/security/advisories/mfsa2026-106/","label":"security@mozilla.org"},{"url":"https://www.mozilla.org/security/advisories/mfsa2026-107/","label":"security@mozilla.org"},{"url":"https://www.mozilla.org/security/advisories/mfsa2026-108/","label":"security@mozilla.org"},{"url":"https://www.mozilla.org/security/advisories/mfsa2026-109/","label":"security@mozilla.org"},{"url":"https://www.mozilla.org/security/advisories/mfsa2026-110/","label":"security@mozilla.org"}],"tags":["nvd","exploit-available","cve.org"],"epss":0.00314,"epssPercentile":0.2416,"exploits":{"github":1,"githubRepos":["https://github.com/Scyrix-LLC/CVE-2026-109715"],"checkedAt":"2026-10-27T19:55:03.863Z"},"exploitAvailable":true,"ssvc":{"exploitation":"none","automatable":"no","technicalImpact":"partial","timestamp":"2026-10-16T18:10:21.015891Z"},"ingestedAt":"2026-10-13T13:27:03.994Z","slug":"CVE-2026-109715","body":"## Overview\n\nIncorrect boundary conditions in the JavaScript Engine component. This vulnerability was fixed in Firefox 158, Firefox ESR 115.43, Firefox ESR 153.5, Thunderbird 158, and Thunderbird 153.5.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"midnight","depthScore":57,"depthScoreParts":{"impact":44.6,"likelihood":0.1,"exploitation":12,"ransomware":0},"changes":[{"seq":229088,"id":"CVE-2026-109715","ts":1792903323319,"field":"exploit_available","old":"false","new":"true"},{"seq":223182,"id":"CVE-2026-109715","ts":1792176236141,"field":"cvss","old":null,"new":"8.1"},{"seq":223181,"id":"CVE-2026-109715","ts":1792176236141,"field":"severity","old":"none","new":"high"}]}