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VQV Signal

SECURITY SOURCE-BACKED TECHNICAL

ECLIPSE: New Stealthy Prompt Injection Attack Targets Long-Horizon LLM Agents

ECLIPSE is a novel prompt injection attack that exploits long-horizon planning in LLM agents by distributing malicious intent across multiple execution stages, making detection difficult. It targets agents like Codex and Claude Code that perform complex tasks via repeated tool calls.

Source: arXiv · arxiv.org Published 2026-08-31T08:32:22+00:00 Detected 2026-09-01T05:23:26+00:00
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ECLIPSE is a novel prompt injection attack that exploits long-horizon planning in LLM agents by distributing malicious intent across multiple execution stages, making detection difficult. It targets agents like Codex and Claude Code that perform complex tasks via repeated tool calls.

AI-assisted summary based on the listed source.

Recently, large language model (LLM) agents, such as Codex, Claude Code, and OpenClaw, have become capable of planning and executing long-horizon tasks through repeated tool calls. This capability also creates new opportunities for prompt injection. Existing attacks either place the malicious objective in one...

As LLM agents gain the ability to execute extended multi-step tasks, new vulnerabilities like ECLIPSE pose significant security risks by enabling stealthy manipulation of their behavior. Understanding such attacks is crucial to developing robust defenses for AI systems with long-term planning capab...

Security-conscious readers may want to review the source and watch for practical exposure or mitigation details.

Signal Strength 95% Technical label SOURCE-BACKED Public Interest 36 Category SECURITY Reader Depth TECHNICAL Event context 1 source

Signal Strength reflects source quality, relevance, freshness and evidence. Public Interest helps organize discovery; it is not proof of truth.

Public Interest components
Recognizable Entity Score 0 Practical Impact Score 28 Novelty Interest Score 94 Consequence Score 30 Curiosity Score 16 Shareability Score 50

Claude is part of a broader security story

Claude has a source-backed security with coverage spanning security.

1 source 1 angle SECURITY

VQV surfaced this signal because it is recent, relevant to AI Security, connected to arXiv.