DOM Editing Flaw in Firefox Affects Browser Functionality
CVE-2026-109754

Currently unrated

Key Information:

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

What is CVE-2026-109754?

A flaw was identified within the DOM boundary conditions of the Editor component in Firefox. This vulnerability can lead to improper handling of certain inputs, potentially impacting the functionality and security of the browser. Mozilla has addressed this issue in the releases of Firefox 158 and Firefox ESR 153.5, ensuring enhanced safety for users.

Affected Version(s)

Firefox 153.5

Firefox 158

References

https://bugzilla.mozilla.org/show_bug.cgi?id=2068443

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

https://www.mozilla.org/security/advisories/mfsa2026-108/

Download the Critical Vulnerability Management Cheat Sheet

Timeline

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

Credit

Mozilla

CVE-2026-109754 Data

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