Attachment spoofing in WhatsApp for Desktop (Windows) - CVE-2026-23863
Published: May 6, 2026
Vulnerability identifier: #VU130231
CSH Severity: Medium
CVSS v4: 6.9 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-23863
CWE-ID: CWE-451
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to perform spoofing attack.
The vulnerability exists due to incorrect processing of attachments with embedded NUL bytes in the filename. A remote attacker can force the application to show a file to be of one type but once clicked will run as an executable, leading to a potential system compromise.
Affected software
WhatsApp for Desktop (Windows)
How to mitigate CVE-2026-23863
Install updates from vendor's website.
WhatsApp for Desktop (Windows) - update to 2.3000.1032164386.258709