CyberSecBulletin

WebKit vulnerabilities

We track 2 vulnerabilities in WebKit products. 2 are rated high or critical, and none are known to be exploited. The most recent was published on August 24, 2026.

2vulnerabilities
0critical
2high
0exploited
8.8average CVSS score

Latest WebKit vulnerabilities

  • 8.8 High severity

    WebKit: Use After Free

    CVE-2026-78376WebKit

    A flaw was found in WebKitGTK. Processing malicious web content can cause a use-after-free issue due to improper memory handling and result in memory corruption.

  • 8.8 High severity

    Webkit: Use After Free

    CVE-2023-39928WebKitEPSS 1.45%

    A use-after-free vulnerability exists in the MediaRecorder API of Webkit WebKitGTK 2.40.5. A specially crafted web page can abuse this vulnerability to cause memory corruption and potentially arbitrary code execution. A user would need to to visit a malicious