CVE-2019-11756: Mozilla Firefox

High severity, CVSS 8.8. EPSS: 1.5% chance of exploitation in the next 30 days.

Improper refcounting of soft token session objects could cause a use-after-free and crash (likely limited to a denial of service). This vulnerability affects Firefox < 71.

Affected products

• Mozilla Firefox: before 71.0 (fixed in 71.0)

Published 2020-01-08. Last modified 2026-06-17.