AIKIDO-2026-657657
quickjs-wasi is vulnerable to Uncontrolled Resource Consumption
50
Medium Risk
This Affects:
quickjs-wasiTL;DR
The runtime creates its QuickJS instance with the engine's default allocator, which reports an allocation size of zero on wasm32-wasi. Allocations are therefore never counted against the memoryLimit option, so the limit never triggers. Guest code can retain many small allocations and grow WASM memory to gigabytes under a limit of a few megabytes, exhausting host memory. The fix creates the runtime with allocator functions that report real allocation sizes.
Who does this affect?
You are affected if you are using a version that falls within the vulnerable range and you rely on the memoryLimit option to bound memory for untrusted guest code.
Background info
quickjs-wasi is vulnerable to Uncontrolled Resource Consumption in versions 0.1.0 - 3.3.0.
How to fix this
Upgrade the quickjs-wasi library to the patch version.
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