CVE-2026-82456: argocd-mcp 0.8.0 Authentication Bypass via Unauthenticated HTTP
argoproj-labs · argocd-mcp
Vendor fix available · Affected: argoproj-labs argocd-mcp · Exploitation: check available, not yet exploited
Not in CyberSIXT coverage yet: no article names this CVE. This page shows the public record.
Higher than 84% of scored CVEs
DescriptionCVE.org
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 products1
From the CVE record. A product or version that is not listed is unknown, not unaffected.
- argoproj-labs · argocd-mcpfrom 0.8.0 before 0.9.0
On the Atlas
Every published CVE is on the CyberSIXT Atlas, grouped by weakness, vendor and month.
- Exploitation
- Check available, not yet exploited. A public nuclei template can confirm it on a system you are authorised to test.
- CISA KEV
- Not listed
- Public check
- argocd-mcp 0.8.0 - Unauthenticated MCP Session and Tool Access · nuclei template in projectdiscovery/nuclei-templates
- Published
- August 2026
CoverageNo articles yet
No CyberSIXT article names CVE-2026-82456 yet, so there is no coverage timeline, action brief or change log for it. Everything on this page comes from the public CVE record, CISA KEV, EPSS and the nuclei template index. Search the archive or see the CVEs in the news.