argocd-mcp 0.8.0 Authentication Bypass via Unauthenticated HTTP
Priority HIGH 82CWE-1327Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Attack requirements
- None
- Impact type
- —
- Confidentiality · integrity · availability
- High · High · High
- Fix status
- Fixed
Attack profile from CVSS 4.0 · CNA. Fix status from CNA.
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.
Why it matters now
Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.02367 83rd percentileScored 2026-11-07
Fix Fixed argocd-mcp (argoproj-labs): 0.9.0
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- Poc
- Automatable
- Yes
- Technical impact
- Total
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| argoproj-labs | argocd-mcp | 0.8.0 to before 0.9.0 | 0.9.0 | Patch available | CNA |
- argocd-mcp Vendorargoproj-labs Affected 0.8.0 to before 0.9.0 Fixed in 0.9.0 Patch available CNA
Remediation
- Fix · CNA argocd-mcp (argoproj-labs) Fixed in 0.9.0
Timeline
- 2026-10-02 Threatist record created from CVE-2026-82456
- 2026-10-03 Alias added: GHSA-p2x5-x87w-v2xj
References
More argoproj-labs vulnerabilities
- TI-2026-70573 Path traversal in argocd-mcp delete_application tool CVSS 4.0MEDIUM 5.3
Sources
- CVE-2026-82456 · CVE Program
- CVE-2026-82456 · NVD
- FIRST EPSS
- GHSA-p2x5-x87w-v2xj · GitHub Advisory Database · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences