CVE-2026-109755

Summary

This vulnerability allows attackers to escape the browser sandbox and gain access to the underlying system by exploiting a flaw in the DOM's Content Processes component. This critical flaw enables arbitrary code execution with high privileges.

Exploitability

Exploitation requires user interaction through a malicious webpage, making it moderately difficult but achievable with social engineering, and relies on the victim visiting an attacker-controlled site.

Blast radius

If exploited, this vulnerability could compromise entire user systems, allowing attackers to execute arbitrary code, access files, and potentially escalate privileges across the entire operating system.

Detection

No reliable host or network indicator is derivable from the published description.

Prioritized remediation

Upgrade to Firefox 158 or Thunderbird 158 immediately to remediate this critical sandbox escape vulnerability.

Analysis generated locally by garnet-coder (no data left the box). AI-assisted — verify against primary sources before acting.