Medium severity · published May 1, 2026
CVE-2026-23866
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…
4.3
CVSS
0.5%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
Attack vector
Network
Complexity
Low
Privileges
Low
User interaction
None
Confidentiality
Low
Integrity
None
Availability
None
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.5% · higher than 41% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
WF
WhatsApp for Android · Facebook
2.25.8.0 before 2.26.7.10 · source: vendor
WF
WhatsApp for iOS · Facebook
2.25.8.0 before 2.26.15.72 · source: vendor
WH
Whatsapp · Whatsapp
2.25.8.0 through 2.26.7.10; 2.25.8.0 through 2.26.15.72 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-23866
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-23866
Third Party Advisory
https://www.facebook.com/security/advisories/cve-2026-23866
Vendor Advisory
https://www.whatsapp.com/security/advisories/2026
More from WhatsApp for Android
9.8
CVE-2019-3568
WhatsApp VOIP Stack Buffer Overflow Vulnerability