Meta WhatsApp: Mehrere Schwachstellen
WID-SEC-2026-1361 · first 05.05.2026 · updated 05.05.2026 · CVSS 6,5
What it is about
Meta WhatsApp ist eine weit verbreitete Messaging-Anwendung, die Text-, Sprach- und Videoanrufe sowie Dateifreigabe über das Internet ermöglicht. Ein Angreifer kann mehrere Schwachstellen in Meta WhatsApp ausnutzen, um falsche Informationen darzustellen oder vertrauliche Informationen offenzulegen.
Under what conditions?
The BSI does not name any particular preconditions. Exploitable remotely according to the BSI.
What can happen in the worst case
An attacker could use the vulnerability to
- falsche Informationen darzustellen oder vertrauliche Informationen offenzulegen
Am I affected?
Affected according to the BSI:
- Meta WhatsApp Windows <2.3000.1032164386.258709
- Meta WhatsApp Android <=2.26.7.10
- Meta WhatsApp iOS <=2.26.15.72
The installed version is usually shown under “Help → About” or in the device’s admin interface.
What helps?
Update to at least:
- Meta WhatsApp Windows 2.3000.1032164386.258709
- Meta WhatsApp Android <=2.26.7.10
- Meta WhatsApp iOS <= 2.26.15.72
Is the vulnerability already being exploited?
None of the CVEs is in the CISA catalogue of exploited vulnerabilities. That does not mean there are no attacks, only that none are documented.
Information and sources
- Original BSI advisory (WID)
- WhatsApp Security Advisories vom 2026-05-04 www.whatsapp.com
CVE: CVE-2026-23863, CVE-2026-23866
Source: BSI warning and information service (CERT-Bund); CISA. The assessment of the conditions is my reading of the BSI text; the external pages are in their original language.