CVE-2026-23866 PUBLISHED

Assigner: Meta
Reserved: 16.01.2026 Published: 01.05.2026 Updated: 01.05.2026

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.

Metrics

CVSS 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
CVSS Score: 4.3

Product Status

Vendor Facebook
Product WhatsApp for Android
Versions Default: unaffected
  • affected from 2.25.8.0 to 2.26.7.10 (excl.)
Vendor Facebook
Product WhatsApp for iOS
Versions Default: unaffected
  • affected from 2.25.8.0 to 2.26.15.72 (excl.)

References

Problem Types

  • Improper Verification of Source of a Communication Channel (CWE-940)