Stored Prompt Injection Vulnerability Through API Gateway
API Gateway
A security write-up demonstrates how stored prompt injection can be achieved through an API gateway to manipulate AI agent behavior. The technique highlights risks in handling untrusted inputs within AI-integrated architectures.
why this severityResearch proof-of-concept demonstrating prompt injection via API gateway.
- first report
- 27 Oct 2026
- last update
- 27 Oct 2026
What to do
Sanitize and validate inputs processed by API gateways and LLM integrations.
Timeline · 1
Sources · 1
News and write-ups
- 2026-10-27Who Governs the Governor? – Stored Prompt Injection Through the API Gatewaydruhindhavala.com · druhindhavala.com/ai-governance/stored-prompt-injection-api-gateway
Titles and links belong to their publishers. The summary above is written by gcdRadar in its own words; data is CC BY-SA 4.0.
Classification
- lane
- Research
- AI role
- Attack on AI
- categories
- Prompt injectionAgent hijack
- severity
- 1 · Research / proof of concept
- targets
- Framework / tooling, Enterprise deployment
- owasp llm top 10
- LLM01:2025 Prompt InjectionLLM06:2025 Excessive Agency
- dates
- happened 27 Oct 2026 · first reported 27 Oct 2026
- origin
- News & research feeds
- record
- confidence 0.90 · created 2026-10-27 20:48Z · updated 2026-11-11 00:12Z
Lane, AI role, categories and severity come from the classifier; the OWASP and ATLAS rows are derived from the categories. How these are assigned
Copy a brief
This record as a short Markdown brief, for a ticket, a chat or a coding agent.
the brief as text
# Stored Prompt Injection Vulnerability Through API Gateway https://gcdradar.vercel.app/incidents/stored-prompt-injection-vulnerability-through-api-gateway · AIR-2026-1599 · closed 2026-11-10 - Lane: Research - Severity: 1 (Research / proof of concept): Research proof-of-concept demonstrating prompt injection via API gateway. - Fix status: Fix status unknown - First reported: 2026-10-27 - AI role: Attack on AI - Products: API Gateway ## Summary A security write-up demonstrates how stored prompt injection can be achieved through an API gateway to manipulate AI agent behavior. The technique highlights risks in handling untrusted inputs within AI-integrated architectures. ## What to do Sanitize and validate inputs processed by API gateways and LLM integrations. ## Latest updates - 2026-10-27: Who Governs the Governor? – Stored Prompt Injection Through the API Gateway (https://druhindhavala.com/ai-governance/stored-prompt-injection-api-gateway) ## Sources - 2026-10-27 druhindhavala.com: Who Governs the Governor? – Stored Prompt Injection Through the API Gateway https://druhindhavala.com/ai-governance/stored-prompt-injection-api-gateway Verify against the vendor's advisory before changing production. Data CC BY-SA 4.0, https://gcdradar.vercel.app.
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