CVE-2026-82456 (GCVE-0-2026-82456)
Vulnerability from cvelistv5 – Published: 2026-08-29 13:47 – Updated: 2026-09-24 14:20
VLAI
EPSS
VEX
Title
argocd-mcp 0.8.0 Authentication Bypass via Unauthenticated HTTP
Summary
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.
Severity
10 (Critical)
SSVC
Exploitation: poc
Automatable: yes
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-02 17:59 UTC
CWE
- CWE-1327 - Binding to an Unrestricted IP Address
Assigner
References
3 references
| URL | Tags |
|---|---|
| https://github.com/argoproj-labs/mcp-for-argocd/s… | vendor-advisory |
| https://github.com/argoproj-labs/mcp-for-argocd | product |
| https://www.vulncheck.com/advisories/argocd-mcp-0… | third-party-advisory |
Impacted products
1 product
| Vendor | Product | Version | CPE status | |
|---|---|---|---|---|
| argoproj-labs | argocd-mcp |
Affected:
0.8.0 , < 0.9.0
(semver)
|
guessed |
Date Public
2026-08-25 00:00
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