CVE-2026-23866

[CVE catalog]

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.

Severity

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

Published

May 1, 2026, 4:16:29 PM UTC

Source

[NVD] · [CVE record]

EPSS

0.47% · Oct 27, 2026

{
  "package_releases": [],
  "fixed_versions": [],
  "distribution_packages": [
    {
      "name": "whatsapp",
      "ecosystem": "cpe",
      "fixed_version": ""
    },
    {
      "name": "whatsapp",
      "ranges": [
        {
          "fixed": "",
          "introduced": "2.25.8.0",
          "last_affected": "2.26.15.72",
          "start_excluding": ""
        }
      ],
      "ecosystem": "cpe",
      "fixed_version": "",
      "provider_record_id": "NVD-CVE-2026-23866"
    }
  ]
}