{"data":{"id":"ceadb6f5-5d93-4321-8125-0d05d2a826d9","title":"Encrypted Skills Can Become New Security Exploits If AI Agents Know How to Decipher","summary":"Researchers introduce Ciphered Skill Injection (CSI), which hides malicious instructions in encoded form inside third-party skill files so that LLM agents decode and follow them. Across eight models and 139 injection-task pairs, the Caesar and layered variants reach attack success rates of up to 47.5% and 40.3% in the primary setting with shortened skills. The tested skill scanners rarely flag the injected skills.","solution":"N/A -- no mitigation discussed in source.","labels":["security","research"],"sourceUrl":"https://arxiv.org/abs/2610.18262v1","publishedAt":"2026-10-13T12:25:46.000Z","cveId":null,"cweIds":null,"cvssScore":null,"cvssSeverity":null,"severity":"medium","attackType":["prompt_injection"],"issueType":"research","affectedPackages":null,"affectedPackageNames":null,"affectedPackageRefs":null,"affectedVendors":[],"affectedVendorsRaw":["LLM agents","agent skill files"],"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":"2026-10-13T12:25:46.000Z","capecIds":null,"crossRefCount":0,"attackSophistication":"moderate","impactType":["integrity","safety"],"aiComponentTargeted":"plugin","llmSpecific":true,"classifierConfidence":0.95,"researchCategory":"preprint","atlasIds":["AML.T0051"]}}