Unrated severityNVD Advisory· Published Aug 2, 2026· Updated Aug 3, 2026
ArcadeDB before 26.7.3 Authentication Bypass via MCP Transport
CVE-2026-68578
Description
ArcadeDB versions before 26.7.3 fail to bind the authenticated principal in the MCP HTTP transport, causing all engine permission checks to silently pass as no-ops. Non-root MCP-allowed users can perform arbitrary database writes, DDL, schema mutations, and execute arbitrary JavaScript code via the query tool.
Affected products
2- Range: <26.7.3
Patches
Vulnerability mechanics
References
2- github.com/ArcadeData/arcadedb/security/advisories/GHSA-6x73-v3rc-f57cmitrevendor-advisory
- www.vulncheck.com/advisories/arcadedb-authentication-bypass-via-mcp-transportmitrethird-party-advisory
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