A WhatsApp design flaw exposed identity data for 3.5 billion users @slidebean
A WhatsApp design flaw exposed identity data for 3.5 billion users @slidebean
Uploaded December 2025 | Updated September 2026, 3 weeks ago
WhatsApp’s “find contacts” feature just exposed 3.5B users.

Researchers bulk searched phone numbers and WhatsApp told them which ones were real.
3.5 BILLION accounts confirmed.
Millions had public photos, names, bios.
Not a hack just automated convenience.
Great for finding friends.
Great for scammers too.

👉Hear the full breakdown on The Slidebean Stand-Up; streaming now on Spotify, Apple Podcasts, and all major podcast platforms.
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A WhatsApp design flaw exposed identity data for 3.5 billion users

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