CVE-2026-117968: Mozilla Firefox · Use-after-free in the DOM: Core & HTML component
Affects Mozilla FirefoxSource CVE Database V5
Not known to be exploited.
Data as of 27 Oct 2026, 14:58 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
Users and administrators should update Firefox to version 159 or later, or to Firefox ESR versions 115.44 or 153.6 or later, to remediate this vulnerability. Since an official fix is available, applying these updates is the recommended and effective mitigation.
Description
CVE-2026-117968 is a use-after-free vulnerability in the DOM Core & HTML component of Mozilla Firefox. This security flaw was addressed and fixed in Firefox 159, Firefox ESR 115.44, and Firefox ESR 153.6. The vulnerability is considered high impact due to the potential risks associated with use-after-free bugs in browser components.