Vulnerability · Published Oct 10, 2026 · Assigned by VulnCheck

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

Medium 5.4

In plain English

A medium-severity path traversal in argocd-mcp from argoproj-labs. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.3% (higher than 21% of all known vulnerabilities).

Severity (CVSS 3.1)5.4Medium

Exploit odds (30 days)0.3%top 78.6% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

Official 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 (as reported)

Vendor	Product	Versions
argoproj-labs	argocd-mcp	0 – through 0.9.0

Weakness: CWE-22 · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:L

References

https://hackmd.io/@haind/argocd-mcp-delete-application-route-smuggling third-party-advisory
https://github.com/argoproj-labs/mcp-for-argocd/blob/28d15ca69b0c31387cc6ec73d201fd13c5d22b6a/src/argocd/client.ts#L115-L139 technical-description
https://github.com/argoproj-labs/mcp-for-argocd/blob/28d15ca69b0c31387cc6ec73d201fd13c5d22b6a/src/argocd/http.ts#L86-L91 technical-description
https://github.com/argoproj-labs/mcp-for-argocd product
VulnCheck Advisory: argocd-mcp through 0.9.0 Path Traversal via delete_application Tool third-party-advisory