PT-2026-31693

Name of the Vulnerable Software and Affected Versions Wasmtime versions prior to 24.0.7, 36.0.7, 42.0.2, and 43.0.1 Description Wasmtime's implementation of transcoding strings between components has a flaw where the return value of a guest component's realloc function is not validated before the...

wasmtime 缓冲区错误漏洞

Wasmtime is a lightweight WebAssembly runtime open source by the Bytecode Alliance. Versions of Wastime prior to 24.0.7, 36.0.7, 42.0.2, and 43.0.1 contained a buffer error vulnerability. This vulnerability stemmed from the lack of validation for the return value of the realloc function in guest...

wasmtime 安全漏洞

Wasmtime is a lightweight WebAssembly runtime open source by the Bytecode Alliance. Versions of Wastime prior to 25.0.0, 25.0.2, 42.0.2, and 43.0.1 contained security vulnerabilities. These vulnerabilities stemmed from the fact that compiling the table.fill instruction could lead to a...

Linux Distros Unpatched Vulnerability : CVE-2026-34942

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available. - Wasmtime is a runtime for WebAssembly. Prior to 24.0.7, 36.0.7, 42.0.2, and 43.0.1, Wasmtime's implementation of transcoding strings into the Component Model's...

PT-2026-31686

Name of the Vulnerable Software and Affected Versions Wasmtime versions 25.0.0 through 36.0.6, 42.0.2, and 43.0.1 Description Wasmtime's Winch compiler has a flaw in how it handles the table.size instruction with 64-bit tables, part of the WebAssembly memory64 proposal. This can lead to the...

CVE-2026-35195: Out-of-bounds Write

Wasmtime is a runtime for WebAssembly. Prior to 24.0.7, 36.0.7, 42.0.2, and 43.0.1, Wasmtime's implementation of transcoding strings between components contains a bug where the return value of a guest component's realloc is not validated before the host attempts to write through the pointer. This...

CVE-2026-34988: Improper Restriction of Operations within the Bounds of a Memory Buffer

Wasmtime is a runtime for WebAssembly. From 28.0.0 to before 36.0.7, 42.0.2, and 43.0.1, Wasmtime's implementation of its pooling allocator contains a bug where in certain configurations the contents of linear memory can be leaked from one instance to the next. The implementation of resetting the...

CVE-2026-34971: Out-of-bounds Read

Wasmtime is a runtime for WebAssembly. From 32.0.0 to before 36.0.7, 42.0.2, and 43.0.1, Wasmtime's Cranelift compilation backend contains a bug on aarch64 when performing a certain shape of heap accesses which means that the wrong address is accessed. When combined with explicit bounds checks a...

PT-2026-31685

Name of the Vulnerable Software and Affected Versions Wasmtime versions prior to 24.0.7, 36.0.7, 42.0.2, and 43.0.1 Description Wasmtime, a runtime for WebAssembly, may experience an uncaught segfault on x86-64 platforms with SSE3 disabled when compiling the f64x2.splat WebAssembly instruction wi...

CVE-2026-34943: Uncaught Exception

Wasmtime is a runtime for WebAssembly. Prior to 24.0.7, 36.0.7, 42.0.2, and 43.0.1, Wasmtime contains a possible panic which can happen when a flags-typed component model value is lifted with the Val type. If bits are set outside of the set of flags the component model specifies that these bits...

wasmtime 缓冲区错误漏洞

Wasmtime is a lightweight WebAssembly runtime open source by the Bytecode Alliance. Versions of Wastime prior to 36.0.7, 42.0.2, and 43.0.1 contained a buffer error vulnerability. This vulnerability stemmed from errors in the Cranelift compilation backend when processing certain heap access...

wasmtime 安全漏洞

Wasmtime is a lightweight WebAssembly runtime open source by the Bytecode Alliance. Versions prior to 24.0.7, 36.0.7, 42.0.2, and 43.0.1 of Wastime contain security vulnerabilities. These vulnerabilities arise when using the Val type promotion feature to increase values of component models. If bi...

PT-2026-31691

Name of the Vulnerable Software and Affected Versions Wasmtime versions 28.0.0 through 36.0.6, 42.0.2 and 43.0.1 Description Wasmtime's pooling allocator implementation contains a flaw where linear memory contents can leak between WebAssembly instances under specific configurations. This occurs d...

wasmtime 缓冲区错误漏洞

Wasmtime is a lightweight WebAssembly runtime open source by the Bytecode Alliance. Versions of Wastime prior to 36.0.7, 42.0.2, and 43.0.1 contained a buffer error vulnerability. This vulnerability stemmed from the pooled allocator using incorrect predicates when resetting virtual memory...

Linux Distros Unpatched Vulnerability : CVE-2026-34945

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available. - Wasmtime is a runtime for WebAssembly. From 25.0.0 to before 36.0.7, 42.0.2, and 43.0.1, Wasmtime's Winch compiler contains a bug where a 64-bit table, part of...

wasmtime 安全漏洞

Wasmtime is a lightweight WebAssembly runtime open source by the Bytecode Alliance. Versions prior to 24.0.7, 36.0.7, 42.0.2, and 43.0.1 of Wastime have security vulnerabilities. These vulnerabilities arise from the use of Cranelift for compiling f64x2.splat WebAssembly instructions on x86-64...

wasmtime 缓冲区错误漏洞

Wasmtime is a lightweight WebAssembly runtime open source by the Bytecode Alliance. Versions of Wastime prior to 36.0.7, 42.0.2, and 43.0.1 contained a buffer error vulnerability. This vulnerability stemmed from a flaw in the Winch compiler backend, which could allow guest Wasm access to host...

CVE-2026-34944: Uncaught Exception

Wasmtime is a runtime for WebAssembly. Prior to 24.0.7, 36.0.7, 42.0.2, and 43.0.1, On x86-64 platforms with SSE3 disabled Wasmtime's compilation of the f64x2.splat WebAssembly instruction with Cranelift may load 8 more bytes than is necessary. When signals-based-traps are disabled this can resul...

wasmtime 输入验证错误漏洞

Wasmtime is a lightweight WebAssembly runtime open source by the Bytecode Alliance. Versions of Wastime prior to 24.0.7, 36.0.7, 42.0.2, and 43.0.1 contained a vulnerability related to input validation errors. This vulnerability stemmed from the improper validation of the alignment of reallocated...

PT-2026-31680

Name of the Vulnerable Software and Affected Versions Wasmtime versions prior to 24.0.7, 36.0.7, 42.0.2, and 43.0.1 Description Wasmtime contains an issue where transcoding a UTF-16 string to the latin1+utf16 component-model encoding incorrectly validates the byte length of the input string durin...