CVE-2026-108585: argocd-mcp through 0.9.0 Path Traversal via delete_application Tool

Severity: medium (CVSS 5.4 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.3% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-10-10 · updated 2026-10-14
Weakness: CWE-22

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.

Affected products

argoproj-labs argocd-mcp: through 0.9.0

References

https://github.com/argoproj-labs/mcp-for-argocd
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://hackmd.io/@haind/argocd-mcp-delete-application-route-smuggling
https://www.vulncheck.com/advisories/argocd-mcp-through-0.9.0-path-traversal-via-delete-application-tool

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