SB2026011215 - Two vulnerabilities in WebKitGTK+ and WPE WebKit

Description

This security bulletin contains information about 2 vulnerabilities.

1) Improper Initialization (CVE-ID: CVE-2025-46299)

CWE-ID: CWE-665 - Improper Initialization

CVSSv4: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Green

The vulnerability allows a remote attacker to gain access to sensitive information.

The vulnerability exists due to improper initialization in WebKit. A remote attacker can trick the victim into visiting a specially crafted website and disclose internal states of the app.

2) Buffer overflow (CVE-ID: CVE-2025-46298)

CWE-ID: CWE-119 - Memory corruption

CVSSv4: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:U/U:Clear

The vulnerability allows a remote attacker to perform a denial of service attack.

The vulnerability exists due to a boundary error when processing HTML content in WebKit. A remote attacker can trick the victim into visiting a specially crafted website, trigger memory corruption and perform a denial of service attack. 

Remediation

Install update from vendor's website.

References

• https://support.apple.com/en-us/125886
• https://webkitgtk.org/security/WSA-2026-0001.html
• https://www.zerodayinitiative.com/advisories/ZDI-26-057/