# [MED] How secure is WebAssembly? 5 security concerns unique to WebAssembly

**Source:** Snyk
**Published:** 2023-07-28
**Article:** https://snyk.io/blog/webassembly-security-concerns/

## Threat Profile

Snyk Blog In this article
Written by Marcelo Oliveira 
July 28, 2023
0 mins read WebAssembly, sometimes called Wasm, is a portable, low-level binary code instruction format executed in a web browser’s virtual machine (VM). It enables developers to write high-performance code in various languages and runs alongside JavaScript. 
Developers are embracing WebAssembly for its ability to accelerate complex algorithms, enable gaming and multimedia applications, and provide a secure sandbox environment …

## Indicators of Compromise (high-fidelity only)

- _No high-fidelity IOCs in the RSS summary._ If the source publishes a technical write-up with defanged IOCs in the body, those would be picked up automatically on the next pipeline run.

## MITRE ATT&CK Techniques

- _Narrative-keyword inference returned no technique mappings; review article for ATT&CK relevance manually._

## Kill chain phases observed

_(none detected from narrative keywords)_

## Recommended hunts

_No actionable hunts can be derived from the RSS summary alone. The article may still warrant manual review — open the source link for actor attribution, IOCs in the body, and TTP detail._


## Why this matters

Severity classified as **MED** based on: 0 use case(s) fired, 0 technique(s) inferred. Read the full article for actor attribution, tooling details, and any defanged IOCs in the body that aren't visible in the RSS summary.