CVE-2026-109773EPSS p13.8%

CVE-2026-109773CVE-2026-109773

Description

Denial-of-service in the Sync component. This vulnerability was fixed in Firefox 158 and Thunderbird 158.

Scoring

CVSS 6.5 ()
VectorCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
EPSS0.24% probability of exploitation · percentile 13.8% · 2026-10-17T12:00:28Z
Last modified2026-10-13
Sourced from NVD + FIRST.org EPSS. Curated for EU compliance use cases by Adam Lundqvist, Founder at SQUR.