AI Agent Threat Matrix
Matrix/Privilege Escalation/T-4005
T-4005validated

Policy Bypass via Encoding

Use encoding tricks to bypass policy enforcement on tool calls and actions

Tactic

Privilege Escalation (Stage 4)

Escalate capabilities beyond declared scope or bypass authorization

Attack Class

UNICODE-STEGO

Using invisible Unicode characters, homoglyphs, and encoding tricks to bypass filters

Evidence

validated

Reproduced in controlled lab environment (DVAA) with documented steps.

DVAA Validation

encoded tool calls

Detection (HackMyAgent)

UNICODE-STEGO-001
npx hackmyagent secure --ci

Defense (OASB Controls)

OASB 2.1OASB 2.2OASB 2.3OASB 2.4OASB 2.5

How to Cite

AI Agent Threat Matrix T-4005 (Policy Bypass via Encoding). OpenA2A, 2026. https://threats.opena2a.org/techniques/T-4005
← Back to Matrix