{"data":{"id":"d13bb6a9-8791-4bc5-8fc8-ea095a45e4a4","title":"Claude Code OAuth Tokens Can Be Stolen Through Stealthy MCP Hijacking","summary":"Attackers can steal OAuth tokens (digital keys that grant access to connected services) from Claude Code, an AI system that performs tasks autonomously, through a man-in-the-middle attack (intercepting communication between two parties). The attack involves installing a malicious npm package that modifies Claude Code's configuration file to redirect all traffic through the attacker's infrastructure, allowing them to capture tokens while remaining undetected.","solution":"N/A -- no mitigation discussed in source.","labels":["security"],"sourceUrl":"https://www.securityweek.com/claude-code-oauth-tokens-can-be-stolen-through-stealthy-mcp-hijacking/","publishedAt":"2026-05-07T14:33:06.000Z","cveId":null,"cweIds":null,"cvssScore":null,"cvssSeverity":null,"severity":"high","attackType":["supply_chain","pii_leakage"],"issueType":"news","affectedPackages":null,"affectedVendors":["Anthropic"],"affectedVendorsRaw":["Claude","Claude Code","Anthropic"],"classifierModel":"claude-haiku-4-5-20251001","classifierPromptVersion":"v3","cvssVector":null,"attackVector":null,"attackComplexity":null,"privilegesRequired":null,"userInteraction":null,"exploitMaturity":null,"epssScore":null,"patchAvailable":null,"disclosureDate":"2026-05-07T14:33:06.000Z","capecIds":null,"crossRefCount":0,"attackSophistication":"moderate","impactType":["confidentiality","integrity"],"aiComponentTargeted":"agent","llmSpecific":false,"classifierConfidence":0.92,"researchCategory":null,"atlasIds":null}}