Race Condition in DNS Component of Firefox by Mozilla
CVE-2026-109779

Currently unrated

Key Information:

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

What is CVE-2026-109779?

A race condition vulnerability exists within the Networking: DNS component of Firefox, which could potentially allow for unintended behavior under specific timing scenarios. This flaw was effectively addressed and patched in Firefox version 158, preventing exploitation that could compromise the integrity of DNS processes.

Affected Version(s)

Firefox 158

References

https://bugzilla.mozilla.org/show_bug.cgi?id=2072048

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-2026-109779 Data

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