2 papers
cs.DB2026
Ghost Echoes: Semantic Erasure Failure in Retrieval-Backed Applications
Allan Mukkuzhi, Noella Uwayisenga, Yeabsira Bizualem +2
Although vector databases correctly implement API-visible deletion, this does not guarantee complete semantic erasure for retrieval-backed applications. We present Ghost Echoes, a…
cs.CR2026
Ghost Vectors: Soft-Deleted Embeddings Remain Reconstructible in HNSW Vector Databases
Chandranil Chakraborttii, Jackeline GarcÃa Alvarado, Sitora Abdulofizova +1
Retrieval-augmented generation (RAG) allows large language models to access external and private corpora for factual, domain-specific responses. Modern RAG pipelines use hierarchic…