CVE-2026-10584 Overview
CVE-2026-10584 affects the proxy server bundled with AWS Graph Explorer before version 3.0.1. When the configured TLS certificate files are missing, the proxy silently falls back to plain HTTP instead of failing closed. Remote attackers positioned to intercept network traffic can capture requests intended to traverse HTTPS, exposing credentials, query payloads, and graph data. The issue is classified as Cleartext Transmission of Sensitive Information [CWE-319]. AWS published Security Bulletin 2026-038 alongside the release of Graph Explorer v3.0.1, which addresses the insecure fallback behavior.
Critical Impact
Unauthenticated, network-adjacent adversaries can intercept sensitive Graph Explorer traffic when TLS certificates are absent, leading to disclosure of credentials and graph database queries.
Affected Products
- AWS Graph Explorer versions prior to 3.0.1
- Graph Explorer proxy server component
- Deployments relying on the bundled proxy for HTTPS termination
Discovery Timeline
- 2026-06-02 - CVE-2026-10584 published to NVD
- 2026-06-02 - Last updated in NVD database
Technical Details for CVE-2026-10584
Vulnerability Analysis
Graph Explorer is an open-source visualization client for graph databases such as Amazon Neptune. It ships with a proxy server that terminates client connections and forwards requests to the backend database. The proxy is expected to serve traffic over HTTPS using administrator-supplied certificate and key files.
In versions before 3.0.1, the proxy startup logic does not enforce a hard failure when the certificate or key files cannot be loaded. Instead, the process degrades to listening on HTTP. Operators receive no clear signal that TLS is disabled, and clients that target the configured port continue to send requests in plaintext.
Because the proxy handles authentication tokens, IAM signing headers, and graph traversal queries, any downgrade to HTTP exposes the full request stream to anyone with access to the network path.
Root Cause
The root cause is insecure default behavior in the proxy's TLS initialization routine. Missing or unreadable certificate files should terminate startup, but the implementation treats the condition as recoverable and continues serving cleartext traffic. This violates fail-secure design principles for transport security.
Attack Vector
Exploitation requires a network position that allows interception of traffic between Graph Explorer clients and the proxy. This includes shared subnets, compromised intermediate hops, malicious Wi-Fi, or attacker-controlled containers in the same cluster. No authentication or user interaction is required. Captured data can include session cookies, AWS SigV4 headers, Gremlin or SPARQL queries, and response payloads containing graph contents.
No public proof-of-concept exploit is currently available, and the vulnerability is not listed in the CISA Known Exploited Vulnerabilities catalog.
Detection Methods for CVE-2026-10584
Indicators of Compromise
- Graph Explorer proxy processes listening on the configured TLS port without a bound certificate.
- Proxy startup logs containing warnings about missing certificate or key files followed by successful bind events.
- Unexpected plaintext HTTP traffic on ports administrators intended to reserve for HTTPS.
- Outbound Graph Explorer client connections negotiating HTTP/1.1 in cleartext to the proxy host.
Detection Strategies
- Inventory running Graph Explorer instances and verify the deployed version against 3.0.1 or later.
- Scan proxy endpoints with TLS probes to confirm certificates are presented on the expected ports.
- Inspect container images and infrastructure-as-code definitions for missing certificate mounts that would trigger the fallback.
Monitoring Recommendations
- Alert on Graph Explorer proxy log entries indicating certificate load failures.
- Monitor network flow data for cleartext HTTP sessions to hosts designated as Graph Explorer proxies.
- Track configuration drift in deployment manifests that reference TLS certificate paths.
How to Mitigate CVE-2026-10584
Immediate Actions Required
- Upgrade all Graph Explorer deployments to version 3.0.1 or later, as documented in the GitHub Release v3.0.1.
- Verify that valid certificate and private key files are present at the paths referenced by the proxy configuration.
- Rotate any credentials, session tokens, or API keys that may have transited an affected proxy on a network where interception was possible.
Patch Information
AWS released Graph Explorer v3.0.1 to address CVE-2026-10584. The release ensures the proxy fails to start when certificate files are missing rather than downgrading to HTTP. Full remediation details are published in the AWS Security Bulletin 2026-038.
Workarounds
- Place the Graph Explorer proxy behind an external TLS terminator such as an Application Load Balancer that enforces HTTPS.
- Restrict proxy network exposure to trusted management subnets until the upgrade to 3.0.1 is complete.
- Add deployment health checks that fail if the proxy is reachable over HTTP on its production port.
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
