Sandbox Escape Vulnerability in Firefox by Mozilla
CVE-2026-109755

Currently unrated

Key Information:

Vendor: Mozilla
Status: Firefox
Vendor: CVE Published:; 13 October 2026

What is CVE-2026-109755?

A vulnerability exists in the Content Processes component of Firefox that allows for sandbox escape, potentially leading to unauthorized access or actions within the browser environment. This issue was addressed in Firefox version 158, mitigating the risk associated with this flaw.

Affected Version(s)

Firefox 158

References

https://bugzilla.mozilla.org/show_bug.cgi?id=2068448

https://www.mozilla.org/security/advisories/mfsa2026-106/

Download the Critical Vulnerability Management Cheat Sheet

Timeline

Vulnerability published
Oct 13, 2026
Vulnerability Reserved
Oct 13, 2026

Credit

Mozilla

CVE-2026-109755 Data

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