argocd-mcp through 0.9.0 Path Traversal via delete_application Tool

Advisories

argocd-mcp through 0.9.0 Path Traversal via delete_application Tool

severity: medium
date: 10/10/2026
Affecting: argocd-mcp <= 0.9.0
CVE: CVE-2026-108585
CWE: CWE-22 Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
CVSS: 5.3
CVSS V4 Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:L/VA:L/SC:N/SI:N/SA:N
References: https://hackmd.io/@haind/argocd-mcp-delete-application-route-smuggling
https://github.com/argoproj-labs/mcp-for-argocd/blob/28d15ca69b0c31387cc6ec73d201fd13c5d22b6a/src/argocd/client.ts#L115-L139
https://github.com/argoproj-labs/mcp-for-argocd/blob/28d15ca69b0c31387cc6ec73d201fd13c5d22b6a/src/argocd/http.ts#L86-L91
https://github.com/argoproj-labs/mcp-for-argocd
Credit: HaiND from the Post and Telecommunication Institute of Technology
Description: argocd-mcp (Argo CD MCP Server) through 0.9.0 contains a path traversal vulnerability in the delete_application tool that allows MCP clients to reach unintended API endpoints via unvalidated applicationName values. Attackers or prompt-injected models can supply dot-segment values like ../repositories/ to send authenticated DELETE requests deleting repositories, clusters, or projects within the token's RBAC permissions.

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