GHSA-VVP9-H8P2-XWFC Wasmtime: Memory leak in C API with `externref` and `anyref` types

Impact Wasmtime 37.0.0 and 37.0.1 have memory leaks in the C/C++ API when using bindings for the anyref or externref WebAssembly values. This is caused by a regression introduced during the development of 37.0.0 and all prior versions of Wasmtime are unaffected. If anyref or externref is not used...

Wasmtime: Memory leak in C API with `externref` and `anyref` types

Impact Wasmtime 37.0.0 and 37.0.1 have memory leaks in the C/C++ API when using bindings for the anyref or externref WebAssembly values. This is caused by a regression introduced during the development of 37.0.0 and all prior versions of Wasmtime are unaffected. If anyref or externref is not used...

EUVD-2025-33183

Wasmtime: Memory leak in C API with externref and anyref types...

PYSEC-2025-268

Wasmtime is a runtime for WebAssembly. Wasmtime 37.0.0 and 37.0.1 have memory leaks in the C/C++ API when using bindings for the anyref or externref WebAssembly values. This is caused by a regression introduced during the development of 37.0.0 and all prior versions of Wasmtime are unaffected. If...

CVE-2025-61670

Wasmtime is a runtime for WebAssembly. Wasmtime 37.0.0 and 37.0.1 have memory leaks in the C/C++ API when using bindings for the anyref or externref WebAssembly values. This is caused by a regression introduced during the development of 37.0.0 and all prior versions of Wasmtime are unaffected. If...

PYSEC-2025-268

Wasmtime is a runtime for WebAssembly. Wasmtime 37.0.0 and 37.0.1 have memory leaks in the C/C++ API when using bindings for the anyref or externref WebAssembly values. This is caused by a regression introduced during the development of 37.0.0 and all prior versions of Wasmtime are unaffected. If...

CVE-2025-61670 Wasmtime has memory leak in C API with `externref` and `anyref` types

Wasmtime is a runtime for WebAssembly. Wasmtime 37.0.0 and 37.0.1 have memory leaks in the C/C++ API when using bindings for the anyref or externref WebAssembly values. This is caused by a regression introduced during the development of 37.0.0 and all prior versions of Wasmtime are unaffected. If...

CVE-2025-61670

CVE-2025-61670 affects Wasmtime 37.0.0 and 37.0.1, where memory leaks occur in the C/C++ API when using bindings for the WebAssembly values anyref/externref. The root cause is a Rust refactor changing ManuallyRooted to OwnedRooted and incomplete propagation of ownership semantics to the C/C++ API...

CVE-2025-61670

Wasmtime is a runtime for WebAssembly. Wasmtime 37.0.0 and 37.0.1 have memory leaks in the C/C++ API when using bindings for the anyref or externref WebAssembly values. This is caused by a regression introduced during the development of 37.0.0 and all prior versions of Wasmtime are unaffected. If...

EUVD-2025-32904

Wasmtime is a runtime for WebAssembly. Wasmtime 37.0.0 and 37.0.1 have memory leaks in the C/C++ API when using bindings for the anyref or externref WebAssembly values. This is caused by a regression introduced during the development of 37.0.0 and all prior versions of Wasmtime are unaffected. If...

CVE-2025-61670 Wasmtime has memory leak in C API with `externref` and `anyref` types

Wasmtime is a runtime for WebAssembly. Wasmtime 37.0.0 and 37.0.1 have memory leaks in the C/C++ API when using bindings for the anyref or externref WebAssembly values. This is caused by a regression introduced during the development of 37.0.0 and all prior versions of Wasmtime are unaffected. If...

CVE-2025-61670 Wasmtime has memory leak in C API with `externref` and `anyref` types

Wasmtime is a runtime for WebAssembly. Wasmtime 37.0.0 and 37.0.1 have memory leaks in the C/C++ API when using bindings for the anyref or externref WebAssembly values. This is caused by a regression introduced during the development of 37.0.0 and all prior versions of Wasmtime are unaffected. If...

EUVD-2021-0464

Malware in sbrugna...

PT-2025-41158

Name of the Vulnerable Software and Affected Versions Wasmtime versions 37.0.0 through 37.0.1 Description Wasmtime, a runtime for WebAssembly, contains memory leaks within its C/C++ API when utilizing bindings for anyref or externref WebAssembly values. This issue stems from a regression introduc...

Wasmtime 安全漏洞

wasmtime is a lightweight WebAssembly runtime open-sourced by the Bytecode Alliance. A security vulnerability exists in Wasmtime version 37.0.0 and 37.0.1, which stems from a memory management flaw in the C/C++ API for anyref or externref values that could lead to a memory leak...

CVE-2025-61670: Missing Release of Resource after Effective Lifetime

Wasmtime is a runtime for WebAssembly. Wasmtime 37.0.0 and 37.0.1 have memory leaks in the C/C++ API when using bindings for the anyref or externref WebAssembly values. This is caused by a regression introduced during the development of 37.0.0 and all prior versions of Wasmtime are unaffected. If...

EUVD-2022-0913

Malicious code in bioql PyPI...

GHSA-75HQ-H6G9-H4Q5 Wasmtime vulnerable to panic when using a dropped extenref-typed element segment

Impact The 19.0.0 release of Wasmtime contains a regression introduced during its development which can lead to a guest WebAssembly module causing a panic in the host runtime. A valid WebAssembly module, when executed at runtime, may cause this panic. The panic in question is caused when a...

OSV-2022-588 Heap-use-after-free in wasmtime_runtime::externref::gc::hcbc8e23ae41614fa

OSS-Fuzz report: https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=49171 Crash type: Heap-use-after-free WRITE 8 Crash state: wasmtimeruntime::externref::gc::hcbc8e23ae41614fa wasmtimefuzzing::oracles::tableops::$u7b$$u7b$closure$u7d$$u7d$::hd207e5ffb69...

Use After Free with `externref`s in Wasmtime

This is an entry in the RustSec database for the Wasmtime security advisory located at https://github.com/bytecodealliance/wasmtime/security/advisories/GHSA-5fhj-g3p3-pq9g. For more information see the GitHub-hosted security advisory...