CVE-2026-23866: Improper Verification of Source of a Communication Channel (CWE-940) in Facebook WhatsApp for Android
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.
CVE-2026-23866: Improper Verification of Source of a Communication Channel (CWE-940) in Facebook WhatsApp for Android
Description
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.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- Meta
- Date Reserved
- 2026-01-16T19:49:26.309Z
- Cvss Version
- null
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 69f4d323cbff5d861010f924
Added to database: 5/1/2026, 4:21:55 PM
Last updated: 5/1/2026, 4:22:25 PM
Views: 1
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