CVE-2026-117995: Mozilla Firefox · Privilege escalation in the DOM: UI Events & Focus Handling component
Affects Mozilla FirefoxSource CVE Database V5
Not known to be exploited.
Data as of 27 Oct 2026, 17:24 UTC
Rated High by Threat Radar's AI analysis · CVSS not yet scored by NVD
Exploitation evidence
Disclosed: evidence found.
CVE published 27 Oct 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponised: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors
A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 26 Oct 2026.
What to do
AI-suggested
This vulnerability has been fixed in Firefox 159 and Firefox ESR 153.6. Users and administrators should update to these versions or later to remediate the issue. No additional mitigation steps are required beyond applying the official update.
Description
CVE-2026-117995 is a privilege escalation vulnerability in the DOM UI Events & Focus Handling component of Mozilla Firefox. This flaw allows an attacker to escalate privileges within the browser environment. The issue was addressed and fixed in Firefox version 159 and Firefox ESR 153.6. No known exploits in the wild have been reported. The vulnerability is considered high impact due to the nature of privilege escalation.