Direct prompt injection
User-supplied text attempting to override application or system instructions.
What Direct prompt injection does not show
Refusal behavior helps but is not a complete authorization control.
Terms this definition uses
Related terms in Security and privacy
Where an agent, a tool or a page can be turned against its operator, and the controls that limit the damage without proving safety.
lookalike domain · homoglyph · incident switch · high-risk field · Indirect prompt injection · Jailbreak · Data exfiltration · Sensitive information disclosure · Secret leakage · Insecure output handling · Excessive agency · Least privilege · Trust boundary · Input validation · Output validation · Allowlist · Denylist · SSRF · RCE · Credential scope · OAuth scope · API key · Bearer token · mTLS · Rate-limit policy · Audit log · PII · Data minimization · Purpose limitation · Retention period · Data residency · Tenant isolation · Threat model · DMARC · DMARC alignment · SPF · DKIM · MTA-STS · TLS-RPT · CAA record · DNSSEC · hard bounce
Questions about Direct prompt injection
What is Direct prompt injection?
User-supplied text attempting to override application or system instructions.
What does Direct prompt injection not show or guarantee?
Refusal behavior helps but is not a complete authorization control.
Which area of the glossary does Direct prompt injection belong to?
Security and privacy: Where an agent, a tool or a page can be turned against its operator, and the controls that limit the damage without proving safety.
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