{"id":"CVE-2026-109708","published":"2026-10-13T13:17:20.910","lastModified":"2026-10-15T20:17:07.163","description":"Sandbox escape due to incorrect boundary conditions in the Networking component. This vulnerability was fixed in Firefox 158, Firefox ESR 153.5, Thunderbird 158, and Thunderbird 153.5.","cvssScore":9.6,"cvssSeverity":"CRITICAL","cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H","cwes":["CWE-119"],"vendors":[],"products":[],"references":[{"url":"https://bugzilla.mozilla.org/show_bug.cgi?id=2059151","tags":[]},{"url":"https://www.mozilla.org/security/advisories/mfsa2026-106/","tags":[]},{"url":"https://www.mozilla.org/security/advisories/mfsa2026-108/","tags":[]},{"url":"https://www.mozilla.org/security/advisories/mfsa2026-109/","tags":[]},{"url":"https://www.mozilla.org/security/advisories/mfsa2026-110/","tags":[]}],"exploitRefs":[],"hasPoc":false,"ai":{"summary":"This vulnerability allows attackers to escape the browser sandbox through flawed boundary checks in the networking component, potentially leading to full system compromise. The high CVSS score indicates a critical risk that can be exploited remotely.","exploitability":"Exploitation requires a user to visit a malicious website or open a crafted email attachment, making it moderately difficult but achievable with social engineering.","blast_radius":"If exploited, this vulnerability could affect millions of Firefox and Thunderbird users across multiple platforms, potentially leading to complete system compromise.","remediation":"Upgrade to Firefox 158, Firefox ESR 153.5, Thunderbird 158, or Thunderbird 153.5 immediately.","detection":"No reliable host or network indicator is derivable from the published description.","tags":["sandbox-escape","browser","remote-code-execution"],"model":"garnet-coder","analyzedAt":"2026-10-16T08:47:32.164Z"}}