Vulnerability Description
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.
CVSS Score
MEDIUM
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| < 2.3000.1032164386.258709 |
Related Weaknesses (CWE)
References
- https://www.facebook.com/security/advisories/cve-2026-23863Third Party Advisory
- https://www.whatsapp.com/security/advisories/2026Vendor Advisory
FAQ
What is CVE-2026-23863?
CVE-2026-23863 is a vulnerability with a CVSS score of 6.5 (MEDIUM). 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 ap...
How severe is CVE-2026-23863?
CVE-2026-23863 has been rated MEDIUM with a CVSS base score of 6.5/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-23863?
Check the references section above for vendor advisories and patch information. Affected products include: Whatsapp Whatsapp.