What’s Vulnerable › Vulnerabilities

CVE-2019-15758

• Severity: medium (CVSS 6.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.2% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2019-08-29 · updated 2026-06-17
• Weakness: CWE-617

Description

An issue was discovered in Binaryen 1.38.32. Missing validation rules in asmjs/asmangle.cpp can lead to an Assertion Failure at wasm/wasm.cpp in wasm::asmangle. A crafted input can cause denial-of-service, as demonstrated by wasm2js.

Affected products

• WebAssembly Binaryen: before 89 — fixed in 89

How to fix

Upgrade to a fixed version: WebAssembly Binaryen 89. Check the vendor advisory for mitigations.

References

• https://github.com/WebAssembly/binaryen/issues/2288
• https://github.com/WebAssembly/binaryen/pull/2290
• https://github.com/WebAssembly/binaryen/issues/2288
• https://github.com/WebAssembly/binaryen/pull/2290

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