CVE-2019-15758: Webassembly Binaryen

Medium severity, CVSS 6.5. EPSS: 1.2% chance of exploitation in the next 30 days.

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)

Published 2019-08-29. Last modified 2026-06-17.