CVE-2026-115892
Severity not reportedWasmtime is a runtime for WebAssembly.
Wasmtime is a runtime for WebAssembly. From 46.0.0 until 48.0.7 and 49.0.4, lowering a host-created component-model stream or future into a guest can omit a required payload-type check after the value passes through guest code and returns through StreamAny, FutureAny, Val::Stream, Val::Future, or an equivalent typed reader. A malicious guest that controls exported function types or returned values can cause the host to pass the type-erased value to a guest expecting a different payload type, which panics the Wasmtime host. This issue is fixed in versions 48.0.7 and 49.0.4.
Affected products
Not reported by the source (unknown — not "none").
Weakness classification (CWE)
Source: NVD / CISA. “NVD-CWE-Other” and “NVD-CWE-noinfo” mean NVD could not assign a specific weakness.
Mitigation & advisories
No vendor advisory or patch reference tagged by NVD. Check the references below.
References
- https://github.com/bytecodealliance/wasmtime/commit/222ff3a65dab9aa7011f8c246937751a0bac5a... security-advisories@github.com
- https://github.com/bytecodealliance/wasmtime/commit/48dacc76241f06088e79f3ce1b17642f2f7bf1... security-advisories@github.com
- https://github.com/bytecodealliance/wasmtime/commit/994549891c8a706cb4f2809f9d17b9f67b31e6... security-advisories@github.com
- https://github.com/bytecodealliance/wasmtime/pull/14819 security-advisories@github.com
- https://github.com/bytecodealliance/wasmtime/pull/14820 security-advisories@github.com
- https://github.com/bytecodealliance/wasmtime/pull/14827 security-advisories@github.com
- https://github.com/bytecodealliance/wasmtime/releases/tag/v48.0.7 security-advisories@github.com
- https://github.com/bytecodealliance/wasmtime/releases/tag/v49.0.4 security-advisories@github.com
- https://github.com/bytecodealliance/wasmtime/security/advisories/GHSA-9pvw-hwfg-92h5 security-advisories@github.com