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CVE-2026-23866

Published: May 1, 2026Updated: May 11, 2026 Sources: CVE List NVDCWE-940
NVD MITRE
4.3CVSSMEDIUM
EPSS Score
0.4%
Top 73.3%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
Patch Available

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.

CVSS Vector Breakdown

AV:NAC:LPR:LUI:NS:UC:LI:NA:N
Exploitability
AV:NAttack Vector
Network
AC:LAttack Complexity
Low
PR:LPrivileges Required
Low
UI:NUser Interaction
None
Scope
S:UScope
Unchanged
Impact
C:LConfidentiality
Low
I:NIntegrity
None
A:NAvailability
None
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Weaknesses

CWE-940

Affected Products

WhatsApp for AndroidFacebookCommunications
WhatsApp for iOSFacebookCommunications
whatsappwhatsapp
Mobile App
Communications / messaging-chat
facebookcommercialUSCommunicationsaka meta, facebook inc.
whatsappcommercialCommunicationsaka whatsapp business, whatsapp desktop

Exploitability

Official Patch Available

References

https://www.facebook.com/security/advisories/cve-2026-23866
facebook.com
https://www.whatsapp.com/security/advisories/2026
whatsapp.com

Timeline

Published
May 1, 2026
Last Updated
May 11, 2026

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