ZDI-CAN-34401: ZDI-26-830: Apple Safari jsToWasm IC Entrypoint Type Confusion Remote Code Execution Vulnerability
Published Oct 28, 2026
·Updated
This vulnerability allows remote attackers to execute arbitrary code on affected installations of Apple Safari. User interaction is required to exploit this vulnerability in that the target must visit a malicious page or open a malicious file. The ZDI has assigned a CVSS rating of 8.8. The following CVEs are assigned: CVE-2026-86974.
Affected Software
1 affected component
Apple Safari
Event History
Oct 28, 2026
Advisory Published
via ZDI·05:00 AM
Data Sourced
via ZDI·05:00 AM
Description
Frequently Asked Questions
1
What does an attacker need to exploit this issue?
The attacker must persuade the target to visit a malicious page or open a malicious file. Successful exploitation can allow the attacker to execute arbitrary code on the affected Safari installation.
2
How severe is this vulnerability?
ZDI assigned this issue a CVSS score of 8.8. It is tracked as CVE-2026-86974.