CVE-2025-14957
Low
Description
A vulnerability was identified in WebAssembly Binaryen up to 125. This affects the function IRBuilder::makeLocalGet/IRBuilder::makeLocalSet/IRBuilder::makeLocalTee of the file src/wasm/wasm-ir-builder.cpp of the component IRBuilder. Such manipulation of the argument Index leads to null pointer dereference. Local access is required to approach this attack. The exploit is publicly available and might be used. The name of the patch is 6fb2b917a79578ab44cf3b900a6da4c27251e0d4. Applying a patch is advised to resolve this issue.
SeverityLow
CVSS3.3
Exploit probability12. percentile0.2%
Product
Webassembly Binaryen
PublishedDec 19, 2025
First seenDec 19, 2025
Weakness typeCWE-476NULL pointer dereferenceCWE-404CWE-404
How to fix
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| webassembly binaryen | v ≤ 125 | — |
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