Wasmtime wasi: wasip3 UDP `send` can deliver a datagram to an address only allowed for receiving
Affects wasmtime-wasiSource GCVE Database
CVSS 6.4 Medium · fixed in 50.0.1 : update wasmtime-wasi when convenient.
Data as of 30 Oct 2026, 11:16 UTC
- Patch
- Available – fixed in 50.0.1, 49.0.5, 48.0.8
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:NWhat to do
Upgrade wasmtime-wasi to 50.0.1, 49.0.5 or 48.0.8.
Affected software
| Product | Affected | Fixed in |
|---|---|---|
crates.iowasmtime-wasipkg:cargo/wasmtime-wasiOther threats | Affected
| Fixed in
|
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AI-suggested
Apply the official patches by upgrading to wasmtime-wasi versions 48.0.8, 49.0.5, or 50.0.1 or later. Since patches are available, remediation should be performed promptly to prevent potential exploitation.
Description
A vulnerability in Wasmtime wasi's wasip3 UDP `send` function allows sending a datagram to an address that should only be permitted for receiving. This issue affects multiple versions of wasmtime-wasi prior to fixed releases. The flaw has a medium severity with a CVSS score of 6.4 and impacts confidentiality and integrity but not availability. Official patches are available in versions 48.0.8, 49.0.5, and 50.0.1.