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TI-2019-07336 Aliases CVE-2019-9970GHSA-9p53-vpmw-2w5c

Open Whisper Signal (aka Signal-Desktop) through 1.23.1 and the Signal Private Messenger…

Priority LOW 33Published · Updated

Key facts

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

Attack profile from CVSS 3.0 · NVD. Fix status from CNA.

Summary

Open Whisper Signal (aka Signal-Desktop) through 1.23.1 and the Signal Private Messenger application through 4.35.3 for Android are vulnerable to an IDN homograph attack when displaying messages containing URLs. This occurs because the application produces a clickable link even if (for example) Latin and Cyrillic characters exist in the same domain name, and the available font has an identical representation of characters from different alphabets.

Why it matters now

EPSS 0.01834 79th percentileScored 2026-11-07
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 · 2

CPEVersionsRoleVendor
cpe:2.3:a:signal:private_messenger:*:*:*:*:*:android:*:*up to 4.35.3VulnerableSignal
cpe:2.3:a:signal:signal-desktop:*:*:*:*:*:*:*:*up to 1.23.1VulnerableSignal
  • cpe:2.3:a:signal:private_messenger:*:*:*:*:*:android:*:* Versions up to 4.35.3 Vulnerable ·Signal
  • cpe:2.3:a:signal:signal-desktop:*:*:*:*:*:*:*:* Versions up to 1.23.1 Vulnerable ·Signal

Remediation

No fixed version listed by the sources yet.

Timeline

  1. 2026-10-02 Threatist record created from CVE-2019-9970
  2. 2026-10-03 Alias added: GHSA-9p53-vpmw-2w5c

References

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-2019-12816 The Signal Private Messenger application before 4.47.7 for Android allows a caller to… CVSS 3.1HIGH 7.5
  • 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