CVE-2021-34421: Keybase

Medium severity, CVSS 4.3. EPSS: 0.7% chance of exploitation in the next 30 days.

The Keybase Client for Android before version 5.8.0 and the Keybase Client for iOS before version 5.8.0 fails to properly remove exploded messages initiated by a user if the receiving user places the chat session in the background while the sending user explodes the messages. This could lead to disclosure of sensitive information which was meant to be deleted from the customer's device.

Affected products

• Keybase Keybase: version 5.8.0 only

Published 2021-11-11. Last modified 2026-06-17.