A vulnerability identified as problematic has been detected in WebAssembly Binaryen up to 117 . This issue affects the function IRBuilder::makeBrOn of the file src/wasm/wasm-ir-builder.cpp of the component BrOn Parser . Performing a manipulation results in reachable assertion. This vulnerability was named CVE-2026-8257 . The attack needs to be approached locally. In addition, an exploit is available. It is suggested to install a patch to address this issue.