CVE-2026-117962: Mozilla Firefox · Sandbox escape due to incorrect boundary conditions in the Storage: Quota Manager 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
This vulnerability has been fixed in Firefox 159 and Firefox ESR 153.6. Users and administrators should update affected Firefox installations to these versions or later to remediate the issue.
Description
CVE-2026-117962 is a high-impact vulnerability in Mozilla Firefox's Storage: Quota Manager component that allows sandbox escape due to incorrect boundary conditions. This flaw was addressed and fixed in Firefox version 159 and Firefox ESR 153.6.