medium6.2
CVE-2026-115388
wasmtime-wasi-http in Wasmtime before 36.0.16, 37.0.0 before 48.0.3, and 49.0.0 before 49.0.1 does not enforce the wasi:io/streams check-write allowance for WA…
Impact
wasmtime-wasi-http in Wasmtime before 36.0.16, 37.0.0 before 48.0.3, and 49.0.0 before 49.0.1 does not enforce the wasi:io/streams check-write allowance for WASIp2 outgoing HTTP bodies, so oversized writes succeed instead of trapping. A malicious guest can pass large buffers to write on outgoing-body resources, holding host allocations for the store's lifetime and exhausting host memory.
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.