Vulnerability DatabaseCVE-2026-82456
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CVE-2026-82456
Published:August 29, 2026
Updated:August 31, 2026
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.
Affected Packages
argocd-mcp (NPM):
Affected version(s) =0.8.0 <0.9.0
Fix Suggestion:
Update to version 0.9.0
Related Resources (5)
https://github.com/argoproj-labs/mcp-for-argocd
https://github.com/argoproj-labs/mcp-for-argocd/security/advisories/GHSA-rp45-5x3v-48mr
https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/82xxx/CVE-2026-82456.json
https://www.vulncheck.com/advisories/argocd-mcp-0.8.0-authentication-bypass-via-unauthenticated-http
https://nvd.nist.gov/vuln/detail/CVE-2026-82456
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CVSS v4
Base Score:
10
Attack Vector
NETWORK
Attack Complexity
LOW
Attack Requirements
NONE
Privileges Required
NONE
User Interaction
NONE
Vulnerable System Confidentiality
HIGH
Vulnerable System Integrity
HIGH
Vulnerable System Availability
HIGH
Subsequent System Confidentiality
HIGH
Subsequent System Integrity
HIGH
Subsequent System Availability
HIGH
CVSS v3
Base Score:
10
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
CHANGED
Confidentiality
HIGH
Integrity
HIGH
Availability
HIGH
Weakness Type (CWE)
Binding to an Unrestricted IP Address
CWE-1327
EPSS
Base Score:
0.37