High
Security advisory
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.
- Products
- Not specified
- Affected versions
- Not specified
- Fixed versions
- Not specified
- CVEs
- CVE-2019-17191
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 1 Nov 2026, 04:12 UTC · Revision 1
Source evidence
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.
osv:CVE-2019-17191
Complete source record
{
"id": "60a8bc7e1e4844c8a0a581fbbcc9ba9889df9fdf5f5c26b31479aee02848127b",
"url": "https://osv.dev/vulnerability/CVE-2019-17191",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "CVE-2019-17191",
"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.",
"evidence": "osv:CVE-2019-17191",
"products": [],
"severity": "high",
"structured": {
"id": "CVE-2019-17191",
"aliases": [
"CVE-2019-17191"
],
"metrics": [
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N"
}
],
"affected": [
{
"ranges": [
{
"repo": "https://github.com/signalapp/signal-android",
"type": "GIT",
"events": [
{
"introduced": "0"
},
{
"fixed": "efa80ab9391c81becedb9b00f19c11e81925902f"
}
],
"database_specific": {
"extracted_events": [
{
"cpe": "cpe:2.3:a:signal:private_messenger:*:*:*:*:*:android:*:*",
"range": [
{
"introduced": "0"
},
{
"fixed": "4.47.7"
}
],
"source": "CPE_RANGE"
}
]
}
}
],
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"database_specific": {
"source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2019-17191.json"
}
}
],
"modified": "2026-10-24T10:30:15.076472087Z",
"provider": "osv",
"references": [
"https://twitter.com/moxie/status/1180261210341511168",
"https://news.ycombinator.com/item?id=21161432",
"https://bugs.chromium.org/p/project-zero/issues/detail?id=1943"
],
"provider_metadata": {}
},
"related_cves": [
{
"value": "CVE-2019-17191",
"evidence": "/id"
}
],
"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 429095,
"published_at": "2019-10-05T02:15:11.3+00:00"
}