Read the docs
TI-2019-12816 Aliases CVE-2019-17191GHSA-hpqc-h2q8-cmcj

The Signal Private Messenger application before 4.47.7 for Android allows a caller to…

Priority LOW 36CWE-863Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Impact type
Security bypass
Confidentiality · integrity · availability
High · None · None
Fix status
No fix listed

Attack profile from CVSS 3.1 · NVD. Fix status from CNA. Impact type from CWE-863.

Summary

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.

Why it matters now

EPSS 0.01755 78th percentileScored 2026-11-07
Public exploit Yes 2 exploit referencesTagged by NVD
Fix No fix listed No fixed version in the sources yet

SSVC decision points

Not available: CISA has not published SSVC decision points for this record.

Affected products

VendorProductAffected versionsFixed inStatusSource
——all versions—No fix listedCNA
  • — Vendor— Affected all versions Fixed in — No fix listed CNA

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:signal:private_messenger:*:*:*:*:*:android:*:*before 4.47.7VulnerableSignal
  • cpe:2.3:a:signal:private_messenger:*:*:*:*:*:android:*:* Versions before 4.47.7 Vulnerable ·Signal

Remediation

No fixed version listed by the sources yet.

Timeline

  1. 2026-10-02 Threatist record created from CVE-2019-17191
  2. 2026-10-03 Alias added: GHSA-hpqc-h2q8-cmcj

References

Exploit 2

Advisory 1

  • TI-2019-12817 The WebRTC component in the Signal Private Messenger application through 4.47.7 for… CVSS 3.1CRITICAL 9.8
  • TI-2019-07336 Open Whisper Signal (aka Signal-Desktop) through 1.23.1 and the Signal Private Messenger… CVSS 3.0MEDIUM 6.5
  • TI-2020-04681 Signal Private Messenger Android v4.59.0 and up and iOS v3.8.1.5 and up allows a remote… CVSS 3.1MEDIUM 5.3
  • TI-2018-02956 Information disclosure in Signal CVSS 3.1MEDIUM 4.7

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences