SEAL: Persistent Tool Poisoning Attack against LLM Agents

# SEAL: Persistent Tool Poisoning Attack against LLM Agents

https://gcdradar.vercel.app/incidents/seal-persistent-tool-poisoning-attack-against-llm-agents · AIR-2026-1416 · closed 2026-11-03

- Lane: Research
- Severity: 1 (Research / proof of concept)
- Fix status: Fix status unknown
- First reported: 2026-10-20
- AI role: Attack on AI

## Summary

Researchers introduced a prefix-eliciting trigger to execute persistent tool poisoning attacks in multi-round LLM agent interactions. The technique improves attack effectiveness against realistic agentic settings.

## What to do

No action recorded; read the sources below and the vendor's advisory.

## Latest updates

- 2026-10-20: SEAL: Towards Persistent Tool Poisoning Attack against LLM Agents via Prefix-Eliciting Trigger (https://arxiv.org/abs/2610.25372)

## Sources

- 2026-10-20 arXiv: SEAL: Towards Persistent Tool Poisoning Attack against LLM Agents via Prefix-Eliciting Trigger https://arxiv.org/abs/2610.25372

Verify against the vendor's advisory before changing production. Data CC BY-SA 4.0, https://gcdradar.vercel.app.