# AppSweep

Published articles for AppSweep.

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## MAST in the Age of Open Source Software |Guardsquare

DevFeed: [MAST in the Age of Open Source Software |Guardsquare](<https://devfeed.tech/articles/mast-in-the-age-of-open-source-software-guardsquare-26310.md>)

Original publisher: [Read original article](<https://www.guardsquare.com/blog/open-source-software-mast>)

Author: Simon Haven - Product Marketing Manager

Published: 2026-09-01T10:59:01Z

Content type: article

Language: en

Sources: [Guardsquare Blog](<https://devfeed.tech/sources/guardsquare-blog.md>)

Topics: [Open Source](<https://devfeed.tech/topics/open-source.md>), [Mobile Security](<https://devfeed.tech/topics/mobile-security.md>), [Application Security](<https://devfeed.tech/topics/application-security.md>), [Vulnerabilities](<https://devfeed.tech/topics/vulnerabilities.md>), [Social engineering](<https://devfeed.tech/topics/social-engineering.md>), [npm](<https://devfeed.tech/topics/npm.md>)

Tags: [app-security-testing](<https://devfeed.tech/tags/app-security-testing.md>), [application-security](<https://devfeed.tech/tags/application-security.md>), [appsweep](<https://devfeed.tech/tags/appsweep.md>), [general](<https://devfeed.tech/tags/general.md>), [malware](<https://devfeed.tech/tags/malware.md>), [mobile](<https://devfeed.tech/tags/mobile.md>), [mobile-apps](<https://devfeed.tech/tags/mobile-apps.md>), [npm](<https://devfeed.tech/tags/npm.md>), [open-source](<https://devfeed.tech/tags/open-source.md>), [open-source-software](<https://devfeed.tech/tags/open-source-software.md>), [social-engineering](<https://devfeed.tech/tags/social-engineering.md>), [supply-chain](<https://devfeed.tech/tags/supply-chain.md>), [vulnerabilities](<https://devfeed.tech/tags/vulnerabilities.md>)

### AI overview

This article explains why mobile application security testing is important when apps use free and open source software. It describes how vulnerable, deprecated, compromised, and transitive third-party dependencies can expand an app's attack surface, citing a September 2025 npm supply chain attack as an example.

### Source excerpt

Building with free and open source software (FOSS) has become common practice for app developers. In 2022, it was estimated that between 70% and 90% of any given software codebase was made up of open source components. Leveraging open source projects presents many advantages: