CVE•Published 2026-05-01•Modified 2026-05-11•0 articles on news•5 live references•NVD data

CVE-2026-23866Whatsapp · Whatsapp

Vulnerability data via NVD (ingested)

CVSS v3.1

4.3

MEDIUM

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

EPSS percentile

Exploit Prediction Scoring System · top 99% of all CVEs

Weaknesses (CWE)

CWE-940Improper Verification of Source of a Communication Channel

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.

Timeline

Published 2026-05-01

Modified 2026-05-11

External references

NVD MITRE Exploit-DB Sploitus VulnCheck

Search for exposed instances

Shodan + Censys queries derived from NVD's CPE data. The vuln tag catches assets Shodan has explicitly linked to this CVE; the product / banner fingerprints find exposed instances even when the vuln tag was never applied (which is common).

Shodan · vuln tag0 hosts

vuln:CVE-2026-23866

Hosts Shodan has explicitly fingerprinted as vulnerable.

Shodan · product

product:"Whatsapp Whatsapp"

All exposed Whatsapp Whatsapp instances — cross-reference with the CVE's affected-version range.

Shodan · banner/body mention

http.html:"Whatsapp"

HTTP body or banner mentions "Whatsapp" — catches deploys Shodan didn't identify as a product.

More intel sources (5)

Shodan report

vuln:CVE-2026-23866