{"id":"CVE-2019-9970","details":"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.","modified":"2026-07-08T16:08:48.870445Z","published":"2019-03-24T02:29:00.670Z","references":[{"type":"ADVISORY","url":"http://www.securityfocus.com/bid/107550"},{"type":"ADVISORY","url":"https://github.com/blazeinfosec/advisories/blob/master/signal-advisory.txt"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/signalapp/signal-android","events":[{"introduced":"0"},{"last_affected":"22ed8caed3630fe9b155fa56db0c8b6292ec9f48"}],"database_specific":{"cpe":"cpe:2.3:a:signal:private_messenger:*:*:*:*:*:android:*:*","extracted_events":[{"introduced":"0"},{"last_affected":"4.35.3"}],"source":"CPE_RANGE"}}],"versions":["v4.35.3","v4.35.2","v4.35.1","v4.35.0","v4.34.8","v4.34.7","v4.34.6","v4.34.5","v4.34.4","v4.34.3","v4.34.2","v4.34.1","v4.34.0","v4.33.5","v4.33.4","v4.33.3","v4.33.2","v4.33.1","v4.33.0","v4.32.8","v4.32.7","v4.32.6","v4.32.5","v4.32.4","v4.32.3","v4.32.2","v4.32.1","v4.32.0","v4.31.8","v4.31.7","v4.31.6","v4.31.5","v4.31.4","v4.31.3","v4.31.2","v4.31.1","v4.31.0","v4.30.7","v4.30.6","v4.30.5","v4.30.4","v4.30.2","v4.30.1","v4.30.0","v4.29.7","v4.29.6","v4.29.5","v4.29.4","v4.29.3","v4.29.2","v4.29.1","v4.29.0","v4.28.1","v4.28.0","v4.27.3","v4.27.2","v4.27.1","v4.27.0","v4.26.2","v4.26.1","v4.26.0","v4.25.10","v4.25.9","v4.25.8","v4.25.7","v4.25.6","v4.25.5","v4.25.4","v4.25.3","v4.25.2","v4.25.1","v4.25.0","v4.24.8","v4.24.7","v4.24.6","v4.24.5","v4.24.4","v4.24.3","v4.24.2","v4.24.1","v4.24.0","v4.23.4","v4.23.3","v4.23.2","v4.23.1","v4.23.0","v4.22.4","v4.22.3","v4.22.2","v4.22.1","v4.22.0","v4.21.6","v4.21.5","v4.21.4","v4.21.3","v4.21.2","v4.21.1","v4.21.0","v4.20.9","v4.20.8","v4.20.7","v4.20.6","v4.20.5","v4.20.4","v4.20.3","v4.20.2","v4.19.3","v4.19.2","v4.19.1","v4.18.3","v4.18.2","v4.18.1","v4.18.0","v4.17.5","v4.17.4","v4.17.3","v4.17.2","v4.17.1","v4.17.0","v4.16.9","v4.16.7","v4.16.6","v4.16.4","v4.16.3","v4.15.5","v4.15.3","v4.15.2","v4.15.1","v4.15.0","v4.14.10","v4.14.9","v4.14.8","v4.14.7","v4.14.6","v4.14.5","v4.14.4","v4.13.3","v4.14.2","v4.14.1","v4.14.0","v4.13.7","v4.13.6","v4.13.5","v4.13.4","v4.13.2","v4.13.1","v4.13.0","v4.12.3","v4.11.5","v4.11.3","v4.11.2","v4.11.1","v4.10.12","v4.10.11","v4.10.10","v4.10.9","v4.10.8","v4.10.7","v4.10.6","v4.10.5","v4.10.2","v4.10.1","v4.9.9","v4.9.8","v4.9.6","v4.9.5","v4.9.4","v4.9.3","v4.9.2","v4.9.1","v4.9.0","v4.8.1","v4.8.0","v4.7.4","v4.7.3","v4.7.2","v4.7.1","v4.7.0","v4.6.0","v4.5.3","v4.5.2","v4.5.0","v4.4.0","v4.3.2","v4.3.1","v4.3.0","v4.2.5","v4.2.4","v4.2.3","v4.2.2","v4.2.1","v4.2.0","v4.1.0","v4.0.1","v4.0.0","v3.31.4","v3.31.2","v3.31.1","v3.31.0","v3.30.4","v3.30.3","v3.30.2","v3.30.1","v3.30.0","v3.29.6","v3.29.5","v3.29.4","v3.29.2","v3.28.4","v3.28.3","v3.28.2","v3.28.1","v3.28.0","v3.27.1","v3.27.0","v3.26.2","v3.26.1","v3.26.0","v3.25.4","v3.25.3","v3.25.2","v3.25.1","v3.25.0","v3.24.1","v3.24.0","v3.23.0","v3.22.2","v3.22.1","v3.22.0","v3.21.3","v3.21.2","v3.21.1","v3.21.0","v3.20.4","v3.20.3","v3.20.2","v3.20.1","v3.19.0","v3.18.3","v3.18.2","v3.18.1","v3.18.0","v3.17.0","v3.16.1","v3.16.0","v3.15.2","v3.15.1","v3.15.0","v3.14.2","v3.14.1","v3.14.0","v3.13.1","v3.13.0","v3.12.0","v3.11.1","v3.11.0","v3.10.0","v3.9.1","v3.9.0","v3.8.0","v3.7.2","v3.7.1","v3.7.0","v3.6.1","v3.6.0","v3.5.2","v3.5.1","v3.5.0","v3.4.2","v3.4.0","v3.3.2","v3.3.1","v3.3.0","v3.1.1","v3.1.0","v3.0.3","v3.0.2","v3.0.1","v3.0.0","v2.28.1","v2.28.0","v2.27.2","v2.27.1","v2.27.0","v2.26.5","v2.26.3","v2.26.2","v2.26.0","v2.25.3","v2.25.1","v2.25.0","v2.24.1","v2.24.0","v2.23.3","v2.32.2","v2.23.1","v2.23.0","v2.22.2","v2.22.1","v2.22.0","v2.21.0","v2.19.1","v2.19.0","v2.18.2","v2.18.1","v2.18.0","v2.17.0","v2.16.4","v2.16.3","v2.16.2","v2.16.1","v2.16.0","v2.14.4","v2.14.3","v2.14.2","v2.14.1","v2.14.0","v2.13.0","v2.12.0","v2.11.1","v2.11.0","v2.10.2","v2.10.1","v2.10.0","v2.9.3","v2.9.2","v2.9.1","v2.8.0","v2.7.0-B1","v2.6.4","v2.6.3","v2.6.2","v2.6.0","v2.5.3","v2.5.2","v2.5.1","v2.4.2","v2.4.1","v2.3.3","v2.3.2","v2.3.1","v2.3.0","v2.2.0","v2.1.10","v2.1.9","v2.1.8","v2.1.7","v2.1.6","v2.1.4","v2.1.2","v2.1.1","v2.1.0","v2.0.8","v2.0.7","v2.0.6","v2.0.5","2.0.4","v2.0.3","v2.0.2","v2.0.1","v2.0","v1.0.6","v1.0.5","v1.0.4","v1.0.3","v1.0.2","v1.0.1","v1.0","v0.9.9.9","v0.9.9.8","v0.9.9.7","v0.9.9.6","v0.9.9.5","v0.9.9.4","v0.9.9.3","v0.9.9.2","v0.9.9.1","v0.9.8","v0.9.7","v0.9.6","v0.9.5","v0.9.4","v0.9.3","v0.9.2","v0.9.1","v0.9","v0.8.6","v0.8.5","v0.8.4","v0.8.3","v0.8.2","v0.8.1","v0.8","v0.7.4","v0.7.3","v0.7.2","v0.7","v0.6.2","v0.6.1","v0.6"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2019-9970.json"}},{"ranges":[{"type":"GIT","repo":"https://github.com/signalapp/signal-desktop","events":[{"introduced":"0"},{"last_affected":"16bd8c1744cf2ca52f7f53117cecdbe9c3b1c747"}],"database_specific":{"cpe":"cpe:2.3:a:signal:signal-desktop:*:*:*:*:*:*:*:*","extracted_events":[{"introduced":"0"},{"last_affected":"1.23.1"}],"source":"CPE_RANGE"}}],"versions":["v1.2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