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 3.1

4.3CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N

EPSS

0.5% chance of exploitation in the next 30 days; higher than 40% of CVEs (scores of 2026-10-26)

CWE

CWE-940

Published

2026-05-01

Modified

2026-10-26

Record from

the NVD, synced 2026-10-26

Affected

• whatsapp:whatsapp

References

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

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