{"data":{"id":"e17fd809-1acc-4c8e-8ad8-c5ef941588f5","title":"Stealthy Poisoning Attacks via Reused KV Cache of Reasoning","summary":"Researchers show that reusing key-value caches built from reasoning traces, which can improve task performance much like RAG, opens new poisoning vulnerabilities in LLM systems. Their black-box attack, R$^2$ECAP, plants poisoned traces through a chat interface alone, and the retained trace keeps adversarial influence after the preceding trace's cache entries are discarded. It reaches up to 79% attack success rate on three open-weight LLMs and three datasets, and 46% in a realistic reasoning-trace retrieval system, while only 1% of its retained responses were flagged by a popular prompt injection detector.","solution":"N/A -- no mitigation discussed in source.","labels":["security","research"],"sourceUrl":"https://arxiv.org/abs/2610.22873v1","publishedAt":"2026-10-16T03:22:33.000Z","cveId":null,"cweIds":null,"cvssScore":null,"cvssSeverity":null,"severity":"info","attackType":["jailbreak","other"],"issueType":"research","affectedPackages":null,"affectedPackageNames":null,"affectedPackageRefs":null,"affectedVendors":[],"affectedVendorsRaw":[],"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":"2026-10-16T03:22:33.000Z","capecIds":null,"crossRefCount":0,"attackSophistication":"advanced","impactType":["integrity","safety"],"aiComponentTargeted":"inference","llmSpecific":true,"classifierConfidence":0.95,"researchCategory":"preprint","atlasIds":["AML.T0054"]}}