What’s Vulnerable › Vulnerabilities

CVE-2019-7154

• Severity: medium (CVSS 6.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.1% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2019-01-29 · updated 2026-06-17
• Weakness: CWE-787

Description

The main function in tools/wasm2js.cpp in Binaryen 1.38.22 has a heap-based buffer overflow because Emscripten is misused, triggering an error in cashew::JSPrinter::printAst() in emscripten-optimizer/simple_ast.h. A crafted input can cause segmentation faults, leading to denial-of-service, as demonstrated by wasm2js.

Affected products

• WebAssembly Binaryen: before 65 — fixed in 65

How to fix

Upgrade to a fixed version: WebAssembly Binaryen 65. Check the vendor advisory for mitigations.

References

• https://github.com/WebAssembly/binaryen/issues/1876
• https://github.com/WebAssembly/binaryen/issues/1876

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