CVE-2020-26957: Mozilla Firefox Mobile

Medium severity, CVSS 6.5. EPSS: 0.5% chance of exploitation in the next 30 days.

OneCRL was non-functional in the new Firefox for Android due to a missing service initialization. This could result in a failure to enforce some certificate revocations. *Note: This issue only affected Firefox for Android. Other operating systems are unaffected.*. This vulnerability affects Firefox < 83.

Affected products

• Mozilla Firefox Mobile: before 83.0 (fixed in 83.0)

Published 2020-12-09. Last modified 2026-08-19.