{"data":{"id":"3bb79378-5f2d-4189-b893-bf67a05ccaf7","title":"The Envelope Layer: An Underestimated Surface of LLM Agent Defense","summary":"This paper studies the envelope layer, the channel through which malicious content enters an LLM agent, using the A2A-TIBA attack as its test vehicle. A two-by-two factorial experiment and a memory experiment measure the semantic breach rate and semantic refusal rate. Strong labels reduce the breach rate only when the envelope is authentic, and memory has a larger effect than label manipulation: success memory raises the breach rate while failure memory lowers it.","solution":"N/A -- no mitigation discussed in source.","labels":["security","research"],"sourceUrl":"https://arxiv.org/abs/2610.37415v1","publishedAt":"2026-10-27T15:32:10.000Z","cveId":null,"cweIds":null,"cvssScore":null,"cvssSeverity":null,"severity":"info","attackType":["prompt_injection"],"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":"2026-10-27T15:32:10.000Z","capecIds":null,"crossRefCount":0,"attackSophistication":"advanced","impactType":["integrity","safety"],"aiComponentTargeted":"agent","llmSpecific":true,"classifierConfidence":0.93,"researchCategory":"preprint","atlasIds":["AML.T0051"]}}