Security Bulletin: Immutable.js Denial of Service Vulnerabilities in Content Cortex for Microsoft Office

Summary Immutable.js versions before 4.3.9 and 5.1.8 have two DoS vulnerabilities CVSS 7.5, High. CVE-2026-59879 is an integer overflow in List operations set, setSize, setIn, updateIn that can cause infinite loops or unbounded memory allocation when given index/size values between 2^30 and 2^31...