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THREAT OPS › Threat News › [NVD] CVE-2026-82456 (CRITICAL 10.0) — 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 creat

[NVD] CVE-2026-82456 (CRITICAL 10.0) — 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 creat

mednvdPublished 2026-08-29

CVE-2026-82456 CVSS: 10.0 CRITICAL Published: 2026-08-29T14:16:38.767

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

MITRE ATT&CK techniques

CredentialsT1589.001

Indicators of compromise

CVE-2026-82456cve

Original source: https://nvd.nist.gov/vuln/detail/CVE-2026-82456