Vulnerability 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.
CVSS Score
MEDIUM
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Bytecodealliance | Webassembly Micro Runtime | <= 2.4.0 |
Related Weaknesses (CWE)
References
- https://github.com/bytecodealliance/wasm-micro-runtime/commit/121232a9957a069bbbPatch
- https://github.com/bytecodealliance/wasm-micro-runtime/releases/tag/WAMR-2.4.1Release Notes
- https://github.com/bytecodealliance/wasm-micro-runtime/security/advisories/GHSA-ExploitThird Party Advisory
FAQ
What is CVE-2025-54126?
CVE-2025-54126 is a vulnerability with a CVSS score of 5.3 (MEDIUM). 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 an...
How severe is CVE-2025-54126?
CVE-2025-54126 has been rated MEDIUM with a CVSS base score of 5.3/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2025-54126?
Check the references section above for vendor advisories and patch information. Affected products include: Bytecodealliance Webassembly Micro Runtime.