Medium severity4.3NVD Advisory· Published May 1, 2026· Updated May 11, 2026
CVE-2026-23866
CVE-2026-23866
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.
AI Insight
LLM-synthesized narrative grounded in this CVE's description and references.
Affected products
3cpe:2.3:a:whatsapp:whatsapp:*:*:*:*:*:android:*:*+ 2 more
- cpe:2.3:a:whatsapp:whatsapp:*:*:*:*:*:android:*:*range: >=2.25.8.0,<=2.26.7.10
- cpe:2.3:a:whatsapp:whatsapp:*:*:*:*:*:iphone_os:*:*range: >=2.25.8.0,<=2.26.15.72
- (no CPE)range: iOS v2.25.8.0 to v2.26.15.72, Android v2.25.8.0 to v2.26.7.10
Patches
Vulnerability mechanics
References
2- www.facebook.com/security/advisories/cve-2026-23866nvdThird Party Advisory
- www.whatsapp.com/security/advisories/2026nvdVendor Advisory
News mentions
2- ⚡ Weekly Recap: Linux Rootkit, macOS Crypto Stealer, WebSocket Skimmers and MoreThe Hacker News · May 11, 2026
- WhatsApp Discloses File Spoofing, Arbitrary URL Scheme VulnerabilitiesSecurityWeek · May 5, 2026