MITRE ATLAS 2026.09 / technique reference
AML.T0080.001
Thread
MITRE source definition
Adversaries may introduce malicious instructions into a chat thread of a large language model (LLM) to cause behavior changes which persist for the remainder of the thread. A chat thread may continue for an extended period over multiple sessions.
The malicious instructions may be introduced via Direct or Indirect Prompt Injection. Direct Injection may occur in cases where the adversary has acquired a user's LLM API keys and can inject queries directly into any thread.
As the token limits for LLMs rise, AI systems can make use of larger context windows which allow malicious instructions to persist longer in a thread. Thread Poisoning may affect multiple users if the LLM is being used in a service with shared threads. For example, if an agent is active in a Slack channel with multiple participants, a single malicious message from one user can influence the agent's behavior in future interactions with others.
Source modified 2026-05-27. Reproduced from the pinned ATLAS release; inline technique links resolve to local reference pages.
Parent, sub-techniques and ATT&CK references
Source-backed defensive context
MITRE mitigations
MITRE case studies
- AML.CS0036 AIKatz: Attacking LLM Desktop Applications · Exercise
- AML.CS0051 OpenClaw Command & Control via Prompt Injection · Exercise
- AML.CS0063 Prompt-Based Attacks Against Gemini via Calendar Invitations · Exercise
These are explicit source relationships, not independently reproduced incidents or validated detection coverage.
Simulation and telemetry boundary
This is a technique reference page, not a runnable simulation. No ATLAS-specific telemetry mapping, local attack execution or detector validation is asserted. MITRE maturity describes its source evidence, not a 1200km lab result.
For broader context—not technique-specific control mappings—see AI Security, AI Security Course, and detection-validation methodology.
Provenance and attribution
Immutable MITRE ATLAS source · Import provenance · Attribution and transformation notice · Apache License 2.0
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No explicit relationship in this pinned source.