CVE-2026-109730

Summary

An integer overflow vulnerability in Firefox's graphics component can lead to memory corruption and potentially arbitrary code execution when processing specially crafted images or web content. This affects both Firefox and Thunderbird browsers.

Exploitability

Exploitation requires a user visiting a malicious website with crafted graphics content, making it moderately difficult but possible with social engineering, and relies on the browser rendering the vulnerable graphics components.

Blast radius

The vulnerability could affect millions of users who browse the web with Firefox or Thunderbird, potentially leading to full system compromise through remote code execution when they view compromised web pages or email attachments.

Detection

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

Prioritized remediation

Upgrade to Firefox 158, Firefox ESR 115.43, Firefox ESR 153.5, Thunderbird 158, or Thunderbird 153.5 immediately.

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