CVE-2026-23866

Unvalidated Media URL Processing Via WhatsApp AI Rich Response Messages

Published May 1, 2026 CVSS 3.1 · 4.3 Medium EPSS < 1% KEV · Not listed
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.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

No advisories available
History
Type Values Removed Values Added
First Time appeared Whatsapp whatsapp
CPEs cpe:2.3:a:whatsapp:whatsapp:*:*:*:*:*:android:*:*
cpe:2.3:a:whatsapp:whatsapp:*:*:*:*:*:iphone_os:*:*
Vendors & Products Whatsapp whatsapp
Type Values Removed Values Added
First Time appeared Whatsapp
Whatsapp whatsapp For Android
Whatsapp whatsapp For Ios
Vendors & Products Whatsapp
Whatsapp whatsapp For Android
Whatsapp whatsapp For Ios
Type Values Removed Values Added
Title Unvalidated Media URL Processing Via WhatsApp AI Rich Response Messages
Type Values Removed Values Added
Weaknesses CWE-940
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Type Values Removed Values Added
Metrics cvssV3_1

{'score': 4.3, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N/E:F/RL:O/RC:C'}

Type Values Removed Values Added
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.
References
Weaknesses

Sources

Status
PUBLISHED
Assigner
Meta
Published
Updated
May 1, 2026, 5:42 PM
Reserved
Jan 16, 2026, 7:49 PM
Status
Analyzed
Published
May 1, 2026, 4:16 PM
Modified
Oct 26, 2026, 9:10 PM