🛡️ Security

Type Confusion

A memory-safety bug (CWE-843) in which code accesses a resource using an incompatible type, such as reading a pointer as an integer. In JavaScript engines it typically arises when optimized code trusts an assumption about an object's shape that a callback has since invalidated, as in CVE-2026-85046.

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How V8 Type Confusion Bugs Turn JavaScript Into Memory Corruption

Why V8's optimizing compilers keep producing type confusion bugs, how one becomes addrof and fakeobj primitives, and where the renderer sandbox actually stops an attacker.

intermediate 6 min read

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