Most recent entries from all

EUVD-2026-231750

2026-10-22T15:55:17.556456+00:00

EUVD-2026-231750

fkie_cve-2023-51661

2026-10-22T15:55:17.556486+00:00

Wasmer is a WebAssembly runtime that enables containers to run anywhere: from Desktop to the Cloud, Edge and even the browser. Wasm programs can access the filesystem outside of the sandbox. Service providers running untrusted Wasm code on Wasmer can unexpectedly expose the host filesystem. This vulnerability has been patched in version 4.2.4.

GHSA-4mq4-7rw3-vm5j — Wasmer filesystem sandbox not enforced

2026-10-22T15:55:17.556527+00:00

Affected: crates.io: wasmer-cli

### Summary As of Wasmer version v4.2.3, Wasm programs can access the filesystem outside of the sandbox.

### Details https://github.com/wasmerio/wasmer/issues/4267

### PoC A minimal Rust program:

``` fn main() { let f = std::fs::OpenOptions::new() .write(true) .create_new(true) .open("abc") .unwrap(); } ```

This should be compiled with `cargo build --target wasm32-wasi`. The compiled program, when run with wasmer WITHOUT `--dir`, can still create a file in the working directory.

### Impact Service providers running untrusted Wasm code on Wasmer can unexpectedly expose the host filesystem.

gsd-2023-51661

2026-10-22T15:55:17.556559+00:00

gsd-2023-51661