{"data":{"id":"cb4febae-0c0e-4dca-960a-0148d90da6c6","title":"The Show-Up Attack: When Subagents Win Over Their Supervisor","summary":"The paper introduces the show-up attack, in which a malicious subagent manipulates its supervisor into involving it in tasks beyond its assigned scope. The authors built SUA-Arena, which implements 6 attack strategies across 188 test cases, and tested 6 frontier LLMs. All were vulnerable, with GPT-5.6-Sol as supervisor reaching an ASR of up to 0.93.","solution":"Mitigation strategies such as prompting and restricted communication fail to reduce the risk consistently. The authors conclude that multi-agent systems need explicit mechanisms for enforcing authority boundaries.","labels":["security","research"],"sourceUrl":"https://arxiv.org/abs/2610.27574v1","publishedAt":"2026-10-20T03:41:13.000Z","cveId":null,"cweIds":null,"cvssScore":null,"cvssSeverity":null,"severity":"info","attackType":["prompt_injection"],"issueType":"research","affectedPackages":null,"affectedPackageNames":null,"affectedPackageRefs":null,"affectedVendors":["OpenAI"],"affectedVendorsRaw":["GPT-5.6-Sol","frontier LLMs","multi-agent systems"],"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":"2026-10-20T03:41:13.000Z","capecIds":null,"crossRefCount":0,"attackSophistication":"moderate","impactType":["integrity","safety"],"aiComponentTargeted":"agent","llmSpecific":true,"classifierConfidence":0.95,"researchCategory":"preprint","atlasIds":["AML.T0051"]}}