CVE-2019-17191: Signal Private Messenger

High severity, CVSS 7.5. EPSS: 1.8% chance of exploitation in the next 30 days.

The Signal Private Messenger application before 4.47.7 for Android allows a caller to force a call to be answered, without callee user interaction, via a connect message. The existence of the call is noticeable to the callee; however, the audio channel may be open before the callee can block eavesdropping.

Affected products

• Signal Private Messenger: before 4.47.7 (fixed in 4.47.7)

Published 2019-10-05. Last modified 2026-06-17.