medium4.8
CVE-2026-115381
Wasmtime before 36.0.17, 37.0.0 before 48.0.4, and 49.0.0 before 49.0.2 contains an unbounded memory allocation in the wasmtime-wasi WASIp2 write-zeroes method…
Impact
Wasmtime before 36.0.17, 37.0.0 before 48.0.4, and 49.0.0 before 49.0.2 contains an unbounded memory allocation in the wasmtime-wasi WASIp2 write-zeroes method of SinkOutputStream, the default stream used when stdout/stderr are not configured. A malicious WebAssembly guest can request huge zero-filled writes, exhausting host memory and causing denial of service.
Affected products
| Product | Affected versions |
|---|---|
| Wasmtime | before 36.0.17 |
| 37.0.0 | before 48.0.4 |
| And 49.0.0 | before 49.0.2 |
Versions were read from the advisory text. No structured product data has been published for this record yet.