low2.3
CVE-2026-115389
Wasmtime before 36.0.16, 37.0.0 before 48.0.3, and 49.0.0 before 49.0.1 does not adequately account for host allocations when lifting guest values through the …
Impact
Wasmtime before 36.0.16, 37.0.0 before 48.0.3, and 49.0.0 before 49.0.1 does not adequately account for host allocations when lifting guest values through the dynamically-typed Val API, bypassing the hostcall fuel limit. A malicious WebAssembly guest can return crafted values that allocate at least ~100x more host memory than tracked, causing denial of service.
Affected products
| Product | Affected versions |
|---|---|
| Wasmtime | before 36.0.16 |
| 37.0.0 | before 48.0.3 |
| And 49.0.0 | before 49.0.1 |
Versions were read from the advisory text. No structured product data has been published for this record yet.