Threats affecting pkg:github/webassembly/binaryen

CVE-2026-8257 is a medium severity vulnerability in WebAssembly Binaryen up to version 117. It involves a reachable assertion failure in the IRBuilder::makeBrOn function within the BrOn Parser component. The vulnerability requires local access to exploit and does not involve user interaction or elevated privileges beyond local user level. A patch identified by commit 1251efbc1ea471c1311d2726b2bbe061ff2a291c is suggested to address the issue. No official remediation level or vendor advisory is provided in the data. The vulnerability has a CVSS 4.8 score indicating moderate impact. Exploits are publicly known but not confirmed in the wild. No cloud service is involved.

A vulnerability was identified in WebAssembly Binaryen up to 125. This affects the function IRBuilder::makeLocalGet/IRBuilder::makeLocalSet/IRBuilder::makeLocalTee of the file src/wasm/wasm-ir-builder.cpp of the component IRBuilder. Such manipulation of the argument Index leads to null pointer dereference. Local access is required to approach this attack. The exploit is publicly available and might be used. The name of the patch is 6fb2b917a79578ab44cf3b900a6da4c27251e0d4. Applying a patch is advised to resolve this issue.

A vulnerability was determined in WebAssembly Binaryen up to 125. Affected by this issue is the function WasmBinaryReader::readExport of the file src/wasm/wasm-binary.cpp. This manipulation causes heap-based buffer overflow. It is possible to launch the attack on the local host. The exploit has been publicly disclosed and may be utilized. Patch name: 4f52bff8c4075b5630422f902dd92a0af2c9f398. It is recommended to apply a patch to fix this issue.