CVE-2026-23866NVD

Vulnerability Summary

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 Level

MEDIUM(4.3)

Published Date

May 1, 2026

Last Modified

Oct 26, 2026

Exploitation Status

No confirmed exploitation yet

EPSS Score (30-Day)

0.47%Probability

Root Weakness (CWE)

CWE-940: Unknown/Unlisted Weakness ↗

Refer to the official MITRE database for detailed architectural specifications regarding this weakness.

CVSS v3.1 Base Metrics — Score 4.3 (MEDIUM)

Attack VectorNetwork

Attack ComplexityLow

Privileges RequiredLow

User InteractionNone

ScopeUnchanged

ConfidentialityLow

IntegrityNone

AvailabilityNone

Affected & Patched Versions

Affected Versions

Whatsapp Whatsapp >= 2.25.8.0 and <= 2.26.7.10
Whatsapp Whatsapp >= 2.25.8.0 and <= 2.26.15.72

Patched Versions

Not provided by NVD for this CVE.

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