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Cheshire Cat Security: WhatsApp View Once Is Completely Broken — And WhatsApp Won’t Fix It

ID: f10d3335-b62c-5b85-a692-4aba71e03a1f

STIX ID: report--f10d3335-b62c-5b85-a692-4aba71e03a1f

Feed Name: Tal Be'ery

Threat Score
55/100

Date Published: 2026-03-18

Date Updated: 2026-04-19

Author: Tal Be'ery

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Researchers disclosed a vulnerability in WhatsApp’s “View Once” media feature that allows modified clients (including browser extensions) to bypass the one-time viewing restriction and save media; WhatsApp declined to fix the issue, arguing the protection is “best effort,” and the researchers recommend adopting DRM and a clearer security model to prevent mass digital extraction.

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