Description
Wasmtime is a runtime for WebAssembly. Prior to versions 24.0.6, 36.0.6, 4.0.04, 41.0.4, and 42.0.0, Wasmtime's implementation of the `wasi:http/types.fields` resource is susceptible to panics when too many fields are added to the set of headers. Wasmtime's implementation in the `wasmtime-wasi-http` crate is backed by a data structure which panics when it reaches excessive capacity and this condition was not handled gracefully in Wasmtime. Panicking in a WASI implementation is a Denial of Service vector for embedders and is treated as a security vulnerability in Wasmtime. Wasmtime 24.0.6, 36.0.6, 40.0.4, 41.0.4, and 42.0.0 patch this vulnerability and return a trap to the guest instead of panicking. There are no known workarounds at this time. Embedders are encouraged to update to a patched version of Wasmtime.
INFO
Published Date :
2026-02-24T21:31:50.186Z
Last Modified :
2026-02-27T20:55:29.879Z
Source :
GitHub_M
AFFECTED PRODUCTS
The following products are affected by CVE-2026-27572 vulnerability.
| Vendors | Products |
|---|---|
| Bytecodealliance |
|
REFERENCES
Here, you will find a curated list of external links that provide in-depth information to CVE-2026-27572.
