CVE-2026-109750

CRITICAL 9.6CVE-2026-109750 · Published 13/10/2026 · updated 19/10/2026

In short

CVE-2026-109750 is a CRITICAL (CVSS 9.6) vulnerability.
Chance of exploitation in the next 30 days (EPSS): 0.38%, higher than 32.0% of all vulnerabilities.
No patched version is listed yet: follow the vendor's advisory in References.

Package	Affected versions	Patched versions
—	No affected product versions are listed for this vulnerability yet.

Site isolation issue in the DOM: Web Authentication component. This vulnerability was fixed in Firefox 158 and Thunderbird 158.

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