HTTP Callback

Exfiltrate data via HTTP POST requests to attacker-controlled endpoints

Tactic

Exfiltration · Stage 8

Transfer collected data out of target environment

Attack class

SKILL-EXFIL

Using legitimate tool capabilities for unauthorized data transfer

Evidence grade

Validated

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

DVAA validation

ToolBot fetch_url POST

Reproductions in Damn Vulnerable AI Agent, the OpenA2A intentionally-broken agent for kill-chain validation.

Honeypot

AgentPwn coverage

Live

data-exfiltrationagentpwn.com/learn ↗

An AgentPwn trap page produces a payload tagged with this technique class. Following the AgentPwn taxonomy of trap pages shows what an agent encounters.

AgentPwn's primary signal: the payload HTTP callback fires.

Detect

Detection · HackMyAgent

Live5 live · 0 queued

NET-001SANDBOX-001SANDBOX-002SANDBOX-003SANDBOX-004

npx hackmyagent secure --ciLive = implemented in hackmyagent; queued = declared

Defend

Defense · OASB controls

Live1 live · 0 queued

OASB 4.3

Live = documented at oasb.ai; queued = declared

Reference

How to cite

AI Agent Threat Matrix T-8002 (HTTP Callback). OpenA2A, 2026. https://threats.opena2a.org/techniques/T-8002

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