Webassembly
Webassembly Binaryen: vulnerabilities and CVEs
Webassembly Binaryen has 25 published vulnerabilities, 3 of them in the last 12 months. 0 are rated critical and 0 are listed by CISA as actively exploited.
CVEs25
Last 12 months3
Critical0
Actively exploited0
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Latest vulnerabilities
| CVE | Severity | EPSS | Active exploitation | Published | Description |
|---|---|---|---|---|---|
| CVE-2026-8257 | Low (1.9) | 0.19% | — | May 11, 2026 | A vulnerability was 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… |
| CVE-2025-14957 | Low (1.9) | 0.21% | — | Dec 19, 2025 | 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… |
| CVE-2025-14956 | Low (1.9) | 0.21% | — | Dec 19, 2025 | 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… |
| CVE-2020-18382 | Medium (6.5) | 0.62% | — | Aug 22, 2023 | Heap-buffer-overflow in /src/wasm/wasm-binary.cpp in wasm::WasmBinaryBuilder::visitBlock(wasm::Block*) in Binaryen 1.38.26. A crafted wasm input can cause a segmentation fault, leading to denial-of-service, as… |
| CVE-2020-18378 | Medium (6.5) | 0.61% | — | Aug 22, 2023 | A NULL pointer dereference was discovered in SExpressionWasmBuilder::makeBlock in wasm/wasm-s-parser.c in Binaryen 1.38.26. A crafted wasm input can cause a segmentation fault, leading to denial-of-service, as… |
| CVE-2021-46055 | Medium (5.5) | 0.70% | — | Jan 10, 2022 | A Denial of Service vulnerability exists in Binaryen 104 due to an assertion abort in wasm::WasmBinaryBuilder::visitRethrow(wasm::Rethrow*). |
| CVE-2021-46054 | Medium (5.5) | 0.70% | — | Jan 10, 2022 | A Denial of Service vulnerability exists in Binaryen 104 due to an assertion abort in wasm::WasmBinaryBuilder::visitRethrow(wasm::Rethrow*). |
| CVE-2021-46053 | Medium (5.5) | 0.70% | — | Jan 10, 2022 | A Denial of Service vulnerability exists in Binaryen 103. The program terminates with signal SIGKILL. |
| CVE-2021-46052 | Medium (5.5) | 0.70% | — | Jan 10, 2022 | A Denial of Service vulnerability exists in Binaryen 104 due to an assertion abort in wasm::Tuple::validate. |
| CVE-2021-46050 | Medium (5.5) | 0.68% | — | Jan 10, 2022 | A Stack Overflow vulnerability exists in Binaryen 103 via the printf_common function. |
| CVE-2021-46048 | Medium (5.5) | 0.70% | — | Jan 10, 2022 | A Denial of Service vulnerability exists in Binaryen 104 due to an assertion abort in wasm::WasmBinaryBuilder::readFunctions. |
| CVE-2021-45293 | Medium (5.5) | 0.78% | — | Dec 21, 2021 | A Denial of Service vulnerability exists in Binaryen 103 due to an Invalid memory address dereference in wasm::WasmBinaryBuilder::visitLet. |
| CVE-2021-45290 | High (7.5) | 1.5% | — | Dec 21, 2021 | A Denial of Service vulnerability exits in Binaryen 103 due to an assertion abort in wasm::handle_unreachable. |
| CVE-2019-15759 | Medium (6.5) | 1.3% | — | Aug 29, 2019 | An issue was discovered in Binaryen 1.38.32. Two visitors in ir/ExpressionManipulator.cpp can lead to a NULL pointer dereference in wasm::LocalSet::finalize in wasm/wasm.cpp. A crafted input can cause segmentation… |
| CVE-2019-15758 | Medium (6.5) | 1.2% | — | Aug 29, 2019 | 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… |
| CVE-2019-7704 | Medium (6.5) | 1.2% | — | Feb 10, 2019 | 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. |
| CVE-2019-7703 | Medium (6.5) | 1.5% | — | Feb 10, 2019 | In Binaryen 1.38.22, there is a use-after-free problem in wasm::WasmBinaryBuilder::visitCall in wasm-binary.cpp. Remote attackers could leverage this vulnerability to cause a denial-of-service via a wasm file, as… |
| CVE-2019-7702 | Medium (6.5) | 1.1% | — | Feb 10, 2019 | A NULL pointer dereference was discovered in wasm::SExpressionWasmBuilder::parseExpression in wasm-s-parser.cpp in Binaryen 1.38.22. A crafted wasm input can cause a segmentation fault, leading to denial-of-service, as… |
| CVE-2019-7701 | Medium (6.5) | 1.2% | — | Feb 10, 2019 | A heap-based buffer over-read was discovered in wasm::SExpressionParser::skipWhitespace() in wasm-s-parser.cpp in Binaryen 1.38.22. A crafted wasm input can cause a segmentation fault, leading to denial-of-service, as… |
| CVE-2019-7700 | Medium (6.5) | 1.2% | — | Feb 10, 2019 | A heap-based buffer over-read was discovered in wasm::WasmBinaryBuilder::visitCall in wasm-binary.cpp in Binaryen 1.38.22. A crafted wasm input can cause a segmentation fault, leading to denial-of-service, as… |
| CVE-2019-7662 | Medium (6.5) | 1.6% | — | Feb 9, 2019 | An assertion failure was discovered in wasm::WasmBinaryBuilder::getType() in wasm-binary.cpp in Binaryen 1.38.22. This allows remote attackers to cause a denial of service (failed assertion and crash) via a crafted wasm… |
| CVE-2019-7154 | Medium (6.5) | 1.1% | — | Jan 29, 2019 | The main function in tools/wasm2js.cpp in Binaryen 1.38.22 has a heap-based buffer overflow because Emscripten is misused, triggering an error in cashew::JSPrinter::printAst() in emscripten-optimizer/simple_ast.h. A… |
| CVE-2019-7153 | Medium (6.5) | 1.2% | — | Jan 29, 2019 | A NULL pointer dereference was discovered in wasm::WasmBinaryBuilder::processFunctions() in wasm/wasm-binary.cpp (when calling wasm::WasmBinaryBuilder::getFunctionIndexName) in Binaryen 1.38.22. A crafted input can… |
| CVE-2019-7152 | Medium (6.5) | 1.2% | — | Jan 29, 2019 | A heap-based buffer over-read was discovered in wasm::WasmBinaryBuilder::processFunctions() in wasm/wasm-binary.cpp (when calling wasm::WasmBinaryBuilder::getFunctionIndexName) in Binaryen 1.38.22. A crafted input can… |
| CVE-2019-7151 | Medium (6.5) | 1.2% | — | Jan 29, 2019 | A NULL pointer dereference was discovered in wasm::Module::getFunctionOrNull in wasm/wasm.cpp in Binaryen 1.38.22. A crafted input can cause segmentation faults, leading to denial-of-service, as demonstrated by wasm-opt. |