CVE Intelligence

1mcp-app vulnerabilities

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Published CVEs affecting 1mcp-app products: 1 record(s), with severity, exploitation and fixes.

@1mcp/agent 1

Exploited only (KEV) →

CVE-2026-108586 Medium · 5.4 CWE-863 Oct 10, 2026
1MCP Agent 0.20.0 through 0.39.0 OAuth Tag-Scope Bypass via Negated Tag Filter
1MCP Agent (@1mcp/agent) 0.20.0 through 0.39.0 contains an incorrect authorization vulnerability that allows authenticated clients to bypass OAuth tag-scope enforcement using negated advanced tag-filter expressions. Attackers holding a single-tag token can send a filter like not <granted-tag> to list and invoke tools on backend MCP servers outside their granted scopes.