Wasmtime is vulnerable to panic when dropping a `[Typed]Func::call_async` future

The affected versions of Wasmtime can panic if the host embedder drops the future returned by wasmtime::component::TypedFunc::callasync before it resolves. Details Starting with Wasmtime 39.0.0, the component-model-async feature became the default, which brought with it a new implementation of...

CVE-2026-27195: Improper Handling of Exceptional Conditions

Wasmtime is a runtime for WebAssembly. Starting with Wasmtime 39.0.0, the component-model-async feature became the default, which brought with it a new implementation of TypedFunc::callasync which made it capable of calling async-typed guest export functions. However, that implementation had a bu...

PT-2026-21804

Name of the Vulnerable Software and Affected Versions Wasmtime versions 39.0.0 through 41.0.3 Description Wasmtime, a runtime for WebAssembly, can experience a panic when the host embedder drops the future returned by wasmtime::component::TypedFunc::call async before it resolves, and then calls t...

WasmTime security vulnerability

Wasmtime is a lightweight WebAssembly runtime open source by the Bytecode Alliance. There is a security vulnerability in Wastime, which stems from a defect in the implementation of TypedFunc::callasync when the component-model-async feature is enabled by default. This could lead to a kernel crash...

CVE-2026-21219

Use after free in Inbox COM Objects allows an unauthorized attacker to execute code locally...

CVE-2026-21219 Inbox COM Objects (Global Memory) Remote Code Execution Vulnerability

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EUVD-2025-35897

Wasmtime vulnerable to segfault when using component resources...

GHSA-4H67-722J-5PMC Wasmtime vulnerable to segfault when using component resources

Impact The implementation of component-model related host-to-wasm trampolines in Wasmtime contained a bug where it's possible to carefully craft a component, which when called in a specific way, would crash the host with a segfault or assert failure. This bug was introduced in the release of...

CVE-2025-62711

Wasmtime is a runtime for WebAssembly. In versions from 38.0.0 to before 38.0.3, the implementation of component-model related host-to-wasm trampolines in Wasmtime contained a bug where it's possible to carefully craft a component, which when called in a specific way, would crash the host with a...

UBUNTU-CVE-2025-62711

Wasmtime is a runtime for WebAssembly. In versions from 38.0.0 to before 38.0.3, the implementation of component-model related host-to-wasm trampolines in Wasmtime contained a bug where it's possible to carefully craft a component, which when called in a specific way, would crash the host with a...

CVE-2025-62711 Wasmtime vulnerable to segfault when using component resources

Wasmtime is a runtime for WebAssembly. In versions from 38.0.0 to before 38.0.3, the implementation of component-model related host-to-wasm trampolines in Wasmtime contained a bug where it's possible to carefully craft a component, which when called in a specific way, would crash the host with a...

CVE-2025-62711

Wasmtime is a runtime for WebAssembly. In versions from 38.0.0 to before 38.0.3, the implementation of component-model related host-to-wasm trampolines in Wasmtime contained a bug where it's possible to carefully craft a component, which when called in a specific way, would crash the host with a...

CVE-2025-62711: Improper Handling of Exceptional Conditions

Wasmtime is a runtime for WebAssembly. In versions from 38.0.0 to before 38.0.3, the implementation of component-model related host-to-wasm trampolines in Wasmtime contained a bug where it's possible to carefully craft a component, which when called in a specific way, would crash the host with a...

WasmTime security vulnerability

wasmtime is a lightweight WebAssembly runtime open-sourced by the Bytecode Alliance. A security vulnerability exists in wasmtime version 38.0.0 through versions prior to 38.0.3, which stems from a flaw in the host-to-wasm springboard implementation associated with the component model, which could...

EUVD-2025-34317

Heap-based buffer overflow in Windows COM allows an authorized attacker to elevate privileges locally...

EUVD-2025-34313

Use after free in Inbox COM Objects allows an unauthorized attacker to execute code locally...

PT-2025-42072

Name of the Vulnerable Software and Affected Versions Inbox COM Objects affected versions not specified Description A use-after-free condition exists in Inbox COM Objects. This allows an unauthorized attacker to execute code locally. Recommendations At the moment, there is no information about a...

Mozilla: Out of bounds memory write from EncodeInputStream

The Mozilla Foundation Security Advisory describes this flaw as: When encoding data from an inputStream in xpcom the size of the input being encoded was not correctly calculated potentially leading to an out of bounds memory write...

Spring Tips: the road to Spring Framework 6: the new Ahead-of-Time Compilation Engine and GraalVM

Hi, Spring fans! Spring Boot 3 is here or will be tomorrow, on the 24th of November, 2022, to be more precise!, bringing a fantastic new Ahead-of-Time AOT compilation engine that supports GraalVM native images. Join me, and well dive deep into the engine and its interactions with the Spring...

Spring Tips: Learn Spring for GraphQL (parts 1 and 2 of an ongoing series)

Hi, Spring fans! In thi^^^ these installments, we begin a new series introducing the Spring for GraphQL project. In this first installment, GraphQL Java lead Andi Marek @andimarek and I @starbuxman look at the basics of using the GraphQL Java engine that underpins Spring for GraphQL. In this seco...