medium5.8
CVE-2026-115391
Wasmtime 46.0.0 before 46.0.3 and 47.0.0 before 47.0.4 contains an uncontrolled resource allocation vulnerability in its WASIp3 implementation that buffers gue…
Impact
Wasmtime 46.0.0 before 46.0.3 and 47.0.0 before 47.0.4 contains an uncontrolled resource allocation vulnerability in its WASIp3 implementation that buffers guest-specified-length writes on the host without limit. Malicious guests can offer large buffers to WASIp3 file or HTTP write streams, causing the host to copy and buffer all bytes, bounded only by guest linear memory, exhausting host memory.
Affected products
| Product | Affected versions |
|---|---|
| Wasmtime 46.0.0 | before 46.0.3 |
| 47.0.0 | before 47.0.4 |
Versions were read from the advisory text. No structured product data has been published for this record yet.