What are build config attacks ?

Attackers hide malicious code in files like next.config.mjs, exploiting PR trust to steal secrets at build time.

How to detect malicious code in GitHub PRs?

Use automated scanners in CI/CD for obfuscated JS in configs; review them manually too, despite the UI hassle.

Are open-source repos safe from PR exploits?

No — over 30 hit already. Add config checks to your workflow pronto.

Attackers Slip Malware into Build Config Files, Bypassing GitHub PR Reviews

A compromised contributor's pull request looks legit—until build config files unleash hidden malware. This supply chain sneak attack is hitting 30+ repos right now.

theAIcatchup Apr 09, 2026 3 min read

GitHub pull request diff hiding malicious code in a build config file like next.config.mjs

⚡ Key Takeaways

Attackers hide malware in build config files like next.config.mjs, evading GitHub PR reviews via UI blind spots. 𝕏
Uses BSC for persistent payloads and Socket.io for stealthy exfil of env vars. 𝕏
Fix with automated scanners in CI/CD; manual reviews fail, UI tweaks insufficient. 𝕏

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theAIcatchup

Community-driven. Code-first.

#GitHub PR exploits #GitHub PR security #automated security scans #build config attacks #build-config-attack #malicious code obfuscation #open source threats #open-source-malware #supply chain attack #supply chain exploits #supply chain malware #supply chain security

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Originally reported by Dev.to

⚡ Key Takeaways

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