ResearchResearch paperLarge Language Models · Safety & Alignment1 source · Oct 20, 2026

Combining Long-Term Memory and LLMs Comes at a High Cost: From Prompt Injection to Persistent Compromise

However, persistent memory features in modern conversational interfaces enable cross-session attack propagation, establishing a threat vector known as memory injection.

Key points

  • The widespread adoption of generative artificial intelligence in recent years has brought a parallel rise in prompt injection and jailbreak attacks.
  • In traditional chatbots, such attacks are confined to a single session because state memory is not preserved across conversations.
  • While existing literature focuses on violations tailored to specific platform features, we present a general threat model.
  • We also show that memory injections can exploit multiple attack vectors, including personal memories, projects, skills, organization instructions, and Model Context Protocol (MCP)-connected resources.

Sources (1)

Extractive summary: sentences quoted from the sources.

Before this

  1. Oct 20, 2026FairStress: A deeper evaluation of fairness in LLM decision-making
  2. Oct 20, 2026When Copying Is Hard: Copy-Constrained Decoding for Exact Span Reproduction
  3. Oct 20, 2026Do Diffusion LLMs Scale? Testing Mercury 3 + Decide
  4. Oct 19, 2026EGI-BENCH: An Enterprise General Intelligence Benchmark Suite
  5. Oct 18, 2026[P] asmsense: 228k stripped x86-64 functions with source-aware labels, and a map of the data we still lack. [P]
  6. Oct 16, 2026[Research] 2,788 tokens/s on a single RTX 5090 with a diffusion LLM — Introducing ORL (fully open source)

Related