CVE-2026-23866

Incomplete validation of AI rich response messages for Instagram Reels in WhatsApp for iOS v2.25.8.0 to v2.26.15.72 and WhatsApp for Android v2.25.8.0 to v2.26.7.10 could have allowed a user to trigger processing of media content from an arbitrary URL on another user’s device, including triggering OS-controlled custom URL scheme handlers. We have not seen evidence of exploitation in the wild.

CVSS v3 4.3 MEDIUM

4.3^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 2.8 / Impact : 1.4

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact LOW

Integrity Impact NONE

Availability Impact NONE

Scope UNCHANGED

References

Link	Resource
https://www.facebook.com/security/advisories/cve-2026-23866	Third Party Advisory
https://www.whatsapp.com/security/advisories/2026	Vendor Advisory

Configurations

Configuration 1 (hide)

OR	cpe:2.3:a:whatsapp:whatsapp::::::android::*
	cpe:2.3:a:whatsapp:whatsapp::::::iphone_os::*

History

No history.

Information

Published : 2026-05-01 16:16

Updated : 2026-06-17 10:22

NVD link : CVE-2026-23866

Mitre link : CVE-2026-23866

CVE.ORG link : CVE-2026-23866

JSON object : View

Products Affected

whatsapp

whatsapp

CWE

CWE-940

Improper Verification of Source of a Communication Channel

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