Analysis
What Is Prompt Injection?
Publication date unknown · Discovered customaistudio.io
Page published
Publication date unknown · First observed: 13 Oct 2026
Coverage timeline
Single-source analysis — one report is available.
Why it matters
Prompt injection is one of the hardest security problems for AI systems and grows more serious as models gain the ability to act through tools and live data, making baseline awareness valuable for defenders.
A glossary entry from CustomAI Studio defines prompt injection, explaining how hidden instructions placed in content an AI model reads can hijack its behavior, and distinguishes direct injection (typed by a user) from the more dangerous indirect injection (planted in external content the model later ingests).