Prismor proposes dual-color privilege isolation for AI agents
Prismor introduces a security design rule for AI agents centered on tool segregation into "Red" (handling untrusted inputs such as web search results or external documents) and "Blue" (performing critical actions such as deleting records or sending emails). To protect against prompt injection and unauthorized execution, the framework enforces that a single agent may hold red tools or blue tools, but never both at the same time.
Segmenting untrusted input channels from sensitive tool execution is the most effective architectural barrier against indirect prompt injection in autonomous AI agent systems.
- –Prevents exploit escalation: Restricting agents that handle untrusted web inputs from accessing high-privilege action APIs closes the execution vector for indirect prompt injection.
- –Enforces taint tracking at agent boundaries: Moving data across agent boundaries creates natural sanitization, inspection, and human-in-the-loop audit checkpoints.
- –Operational overhead: Requires developers to design multi-agent pipelines rather than relying on monolithic, all-in-one agent architectures.
DISCOVERED
1h ago
2026-07-28
PUBLISHED
1h ago
2026-07-28
RELEVANCE
AUTHOR
prismor_dev