CVE-2021-34421

Retained exploded messages in Keybase Clients for Android and iOS

MEDIUM
4.3
CVSS Score
Published: November 11, 2021 at 10:58 PM UTC
Updated: June 17, 2026 at 03:55 AM UTC
2 products affected across 2 vendorsKeybaseKeybase

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Severity
MEDIUM4.3
Exploit prediction
EPSS 0.7%

Description

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

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

v < 5.8.0
Affected range stops below 5.8.0, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet, and no fixed version or vendor advisory is recorded against it.

References (1)

CVSS

Attack Vector
NETWORK
Complexity
LOW
Privileges
NONE
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality
LOW
Integrity
NONE
Availability
NONE
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-459

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