What’s Vulnerable › Vulnerabilities

CVE-2019-7704

• 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: 2019-02-10 · updated 2026-06-17
• Weakness: CWE-770

Description

wasm::WasmBinaryBuilder::readUserSection in wasm-binary.cpp in Binaryen 1.38.22 triggers an attempt at excessive memory allocation, as demonstrated by wasm-merge and wasm-opt.

Affected products

• WebAssembly Binaryen: before 64 — fixed in 64

How to fix

Upgrade to a fixed version: WebAssembly Binaryen 64. Check the vendor advisory for mitigations.

References

• https://github.com/WebAssembly/binaryen/issues/1866
• https://github.com/WebAssembly/binaryen/issues/1866

Get alerted when CVE-2019-7704 or the next vulnerability affects your stack