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TI-2026-70574 CVE-2026-108586 · GHSA-w2j7-xxh9-9q67

1MCP Agent OAuth tag-scope bypass via negated tag filter

Priority LOW 23

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.

CVSS 4.0MEDIUM 5.3· Network · Low privileges · No interaction · EPSS 0.0019 · Published 2026-10-10 · No fix listed CWE-863

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