Analysis · curated 20 Aug 2026
What is System Prompt Leak? | explainx.ai AI Dictionary
First reported explainx.ai
Coverage timeline
Single-source analysis — first reported, latest, and curated coincide.
Why it matters
System prompt leaks expose the guardrails and tool schemas defenders rely on to constrain LLM behavior, but this entry is an evergreen dictionary definition rather than a specific incident or new finding.
A glossary entry from explainx.ai defines "System Prompt Leak" as the accidental or coaxed exposure of the hidden instructions a provider gives a model before a conversation, revealing rules, tool definitions, and behavioral guardrails. The entry notes such leaks occur via jailbreak-style extraction prompts, exposed debugging endpoints, or direct publication, and can reveal how a product was built.