CVE-2025-54126: bytecodealliance wasm-micro-runtime Exposure of Resource to Wrong Sphere

Vulnerability summary

CVE-2025-54126 is a medium (CVSS 6.9) Exposure of Resource to Wrong Sphere vulnerability in bytecodealliance wasm-micro-runtime. EPSS estimates a 0.67% chance of exploitation in the next 30 days, higher than 51.2% of scored vulnerabilities. 1 public exploit is recorded.

Timeline

1. 29-07-2025
   PublishedVulnerability first disclosed.
2. 30-07-2025
   Last modifiedVulnerability information updated.

Description

The WebAssembly Micro Runtime's (WAMR) iwasm package is the executable binary built with WAMR VMcore which supports WebAssembly System Interface (WASI) and command line interface. In versions 2.4.0 and below, iwasm uses --addr-pool with an IPv4 address that lacks a subnet mask, allowing the system to accept all IP addresses. This can unintentionally expose the service to all incoming connections and bypass intended access restrictions. Services relying on --addr-pool for restricting access by IP may unintentionally become open to all external connections. This may lead to unauthorized access in production deployments, especially when users assume that specifying an IP without a subnet mask implies a default secure configuration. This is fixed in version 2.4.1.

• CWE-668Exposure of Resource to Wrong SphereThe product exposes a resource to the wrong control sphere, providing unintended actors with inappropriate access to the resource.