CVE-2026-115380
Medium
Description
Wasmtime before 36.0.17, 37.0.0 before 48.0.4, and 49.0.0 before 49.0.2 contains a denial of service vulnerability in the wasmtime-wasi WASI preview 0 poll_oneoff adapter, which performs O(n) host work per subscription without consuming or checking fuel. Malicious guest modules can pass many subscriptions to force long-running host computation that ignores configured fuel limits.
SeverityMedium
CVSS4.0
Exploit probability—
ProductBytecodealliance Wasmtime
PublishedOct 22, 2026
First seenOct 22, 2026
Weakness typeCWE-770Allocation of resources without limits
How to fix
Update
- bytecodealliance wasmtime36.0.17, 48.0.4, 49.0.2 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| bytecodealliance wasmtime | v < 36.0.17, 37.0.0 ≤ v < 48.0.4, 49.0.0 ≤ v < 49.0.2 | 36.0.17, 48.0.4, 49.0.2 |
Check your version
Choose the product and enter the version you run to see whether it falls in the affected range.
In the Intelligence 360 plan
Attack Surface Management
See the assets tied to your domains, the technologies they run and known vulnerabilities in one list.