CVE-2026-23863: WhatsApp

Medium severity, CVSS 6.5. EPSS: 0.5% chance of exploitation in the next 30 days.

An attachment spoofing issue in WhatsApp for Windows prior to v2.3000.1032164386.258709 could have allowed maliciously formatted documents with embedded NUL bytes in the filename to be shown in the application as one type of file but run as an executable when opened. We have not seen evidence of exploitation in the wild.

Affected products

• WhatsApp WhatsApp: before 2.3000.1032164386.258709 (fixed in 2.3000.1032164386.258709)

Published 2026-05-01. Last modified 2026-06-17.