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CVE-2026-23863

MEDIUM
6.5
CVSS Score
Published: May 1, 2026 at 04:01 PM UTC
Updated: October 26, 2026 at 10:10 PM UTC
1 product affected across 1 vendorWhatsApp

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Severity
MEDIUM6.5
Exploit prediction
EPSS 0.5%
SSVC
No known exploit

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.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

WhatsApp· Whatsapp
95%
v < 2.3000.1032164386.2587092.3000.*.252500
Affected range stops below 2.3000.1032164386.258709, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

Patch and advisory references

References (2)

x_refsource_CONFIRMThird Party Advisory
Source: cverecord
https://www.facebook.com/security/advisories/cve-2026-23863
x_refsource_CONFIRMVendor Advisory
Source: cverecord
https://www.whatsapp.com/security/advisories/2026

SSVC — Action Prioritization

SSVCNo known exploitNot automatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

6.5MEDIUMMeta
Vector?

Quick Info

StatusANALYZED
CWE
CWE-158

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