CVE-2026-82456: critical vulnerability in argoproj-labs argocd-mcp
argocd-mcp 0.8.0 Authentication Bypass via Unauthenticated HTTP
Published · Updated
E-mail alert when it lands in KEV, gets a public PoC or its score goes up.
43Vexday Risk Score
Patch soon. It has a working public exploit.
ssvc Attendcvss 10epss 2.4%
argocd-mcp 0.8.0 binds its HTTP transport to every network interface and accepts MCP sessions without requiring caller credentials when ARGOCD_API_TOKEN is configured. Attackers who can reach the listener can invoke the full tool surface using the operator's stored token to create applications, request syncs, and modify Argo CD resources.
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H
Affected products
argoproj-labs · argocd-mcpRelated CVEs — argoproj-labs argocd-mcp
In the same product, most dangerous first.