[HN]score: 0.31

6,000 Prompt Injection Attempts Failed to Leak Secrets from AI Email Agent

June 25, 2026

A public red-team of an OpenClaw AI email assistant saw 6,000+ injection attempts from 2,000+ users fail to extract a secrets.env file. Defense was a hardcoded system prompt with explicit rules blocking credential disclosure, file modification, and remote code execution triggered by email content. Suggests simple rule-based guardrails can hold at moderate crowd-sourced attack scale for agentic systems with broad access.

HOW THIS AFFECTS YOU

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builderYou can replicate this pattern — explicit, enumerated anti-injection rules in the system prompt appear sufficient to block crowd-sourced exfiltration attempts on agentic assistants with file and email access.

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policyWorth watching because it provides empirical data on prompt injection resilience in agentic deployments, a threat model regulators and safety teams are actively trying to quantify.

read original ↗fernandoi.cl

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