CVE-2026-109707

Summary

A use-after-free vulnerability in Firefox's Networking component allows attackers to escape the sandbox and gain full system access. This critical flaw enables remote code execution through a memory corruption issue.

Exploitability

Exploitation requires a user visiting a malicious website with a crafted payload, making it moderately difficult but possible with social engineering, and relies on the browser being in its default security configuration.

Blast radius

If exploited, this vulnerability could affect millions of Firefox users globally, potentially leading to complete system compromise and data theft across desktop and mobile platforms.

Detection

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

Prioritized remediation

Upgrade to Firefox 158 or Thunderbird 158 immediately, as these versions contain the fix for CVE-2026-109707.

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