SB2026102035 - Multiple vulnerabilities in WebKitGTK+ and WPE WebKit

Description

This security bulletin contains information about 2 vulnerabilities.

1) State Issues (CVE-ID: CVE-2026-86872)

CWE-ID: CWE-371 - State Issues

CVSSv4: 5.1 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N]

The vulnerability allows a remote attacker to bypass implemented security restrictions.

The vulnerability exists due to a logic issue in WebKit. A remote attacker can trick the victim into visiting a specially crafted website and bypass implemented security restrictions. 

2) Type confusion (CVE-ID: CVE-2026-86922)

CWE-ID: CWE-843 - Type confusion

CVSSv4: 8.6 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]

The vulnerability allows a remote attacker to execute arbitrary code on the target system.

The vulnerability exists due to a type confusion error in WebKit engine. A remote attacker can trick the victim into visiting a specially crafted website, trigger a type confusion error and execute arbitrary code on the target system.

Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.

Remediation

Install update from vendor's website.

References

• https://support.apple.com/en-us/149039