{"data":{"id":"61eec9bc-57e4-4d38-87ad-e2767a1a1b51","title":"Context-Aware Prompt Injection Detection via Small Language Models in RAG Pipelines: nokast-secureRAG","summary":"nokast-secureRAG is a roughly 0.5B-parameter small language model that acts as a semantic firewall between retrieval and generation in local RAG systems, classifying each query and retrieved context pair as safe, suspicious, or malicious. On a held-out in-distribution test set it reaches 0.994 detection recall at a 0.026 false-positive rate, but recall falls to near zero on the external PoisonedRAG benchmark, which the authors attribute to fluent fact-poisoning attacks lying outside the detector's instruction-consistency threat model.","solution":"N/A -- no mitigation discussed in source.","labels":["security","research"],"sourceUrl":"https://arxiv.org/abs/2610.28364v1","publishedAt":"2026-10-20T15:26:15.000Z","cveId":null,"cweIds":null,"cvssScore":null,"cvssSeverity":null,"severity":"info","attackType":["prompt_injection","rag_poisoning"],"issueType":"research","affectedPackages":null,"affectedPackageNames":null,"affectedPackageRefs":null,"affectedVendors":[],"affectedVendorsRaw":["Llama Guard 3 1B","Prompt-Guard-86M"],"classifierModel":"claude-haiku-5-5","classifierPromptVersion":"v4","summaryPromptVersion":"v2","headline":null,"headlinePromptVersion":null,"cvssVector":null,"attackVector":null,"attackComplexity":null,"privilegesRequired":null,"userInteraction":null,"exploitMaturity":null,"epssScore":null,"epssCheckedAt":null,"kevDateAdded":null,"advisoryAliases":null,"affectedPackagesSource":null,"affectedPackagesCheckedAt":null,"patchAvailable":null,"disclosureDate":"2026-10-20T15:26:15.000Z","capecIds":null,"crossRefCount":0,"attackSophistication":"moderate","impactType":["integrity","safety"],"aiComponentTargeted":"rag","llmSpecific":true,"classifierConfidence":0.95,"researchCategory":"preprint","atlasIds":["AML.T0051","AML.T0070"]}}