[NEWSLETTER]score: 1.06
Prompt Injection Plus GitHub App Bypass Can Hijack Claude Code Workflows
June 2, 2026
A chained attack combining a GitHub App permission bypass with prompt injection can redirect Claude Code's CI workflows, potentially granting repository takeover and access to Anthropic's claude-code-action source code. The technique targets the workflow execution context rather than the model itself.
HOW THIS AFFECTS YOU
●
builderIf you're running Claude Code or any LLM-driven CI action, audit GitHub App permission scopes and add prompt-injection guards to workflow inputs now.
●
policyDemonstrates that prompt injection combined with OAuth permission flaws creates supply chain risk in AI-assisted development pipelines — a concrete attack class needing formal threat modeling.