Critical Authentication Bypass in Kestra Orchestration Platform Exposes Root Execution Risks
Overview
CVE-2026-53576 represents a CVSS 10.0 vulnerability in Kestra's REST API authentication filter, enabling unauthenticated actors to bypass security controls and execute arbitrary code as root. This flaw undermines core security guarantees for orchestration workflows in enterprise environments.
Technical Analysis
The vulnerability stems from a path-matching logic error in Kestra's authentication filter, which mistakenly treats any request path ending with /configs as public. Attackers exploit this by crafting requests to /api/v1/<tenant>/configs, bypassing Basic-Auth protections entirely. This allows access to flow creation and execution triggers, enabling deployment of Shell/Process tasks with root privileges. Exploitation requires no credentials and leverages standard HTTP request patterns.
Enterprise & DIB Impact
Defense Industrial Base and enterprise systems using vulnerable Kestra versions face immediate risk of unauthorized workflow manipulation, sensitive configuration exposure, and persistent access via arbitrary code execution. Attackers could establish footholds in orchestration pipelines, compromising CI/CD integrity and exfiltrating strategic data.
Recommended Actions
- Upgrade to Kestra 1.0.45 or 1.3.21 immediately
- implement strict input validation for API path segments
- deploy network-level WAF rules blocking /configs path patterns
- monitor for anomalous flow creation activity
- and conduct API security audits for similar pattern-matching vulnerabilities.
Need Help Assessing Your Exposure?
Axiom Cyber Research provides vulnerability assessment, red team operations, and security advisory services to the Defense Industrial Base and regulated sectors.
Schedule a ConsultationFull security advisory on 247alerts.net →