CVE-2026-53576

The record

Kestra is an open-source, event-driven orchestration platform. Prior to 1.0.45 and 1.3.21, the authentication filter for the REST API (@Filter("/api/v1/**")) treats any request whose path ends in /configs as the public instance-config endpoint and forwards it without a credential check. kestra addresses its resources by URL path segments that the caller chooses (/api/v1/{tenant}/flows/{namespace}, /api/v1/{tenant}/executions/{namespace}/{id}, /api/v1/{tenant}/namespaces/{namespace}/kv/{key}). An anonymous caller picks the literal configs as the final segment, and the request bypasses Basic-Auth entirely. Because the bypass reaches the flow-create and execution-trigger routes, an unauthenticated caller creates a flow containing a Shell or Process task and runs it. The task executes as root inside the kestra container. The official docker-compose.yml mounts /var/run/docker.sock, so root in the container reaches the host Docker daemon. This vulnerability is fixed in 1.0.45 and 1.3.21.

Affected packages

Related vulnerabilities

• CVE-2026-114125 Storybook is a frontend workshop for building user interface components and pages in… CWE-94
• CVE-2026-113776 virtualenv is a tool for creating isolated virtual python environments. CWE-94
• CVE-2026-112100 A vulnerability was determined in DeepPavlov up to 1.7.0. CWE-94
• CVE-2026-112095 A flaw has been found in SourceCodester Inventory System 1.0. CWE-94
• CVE-2026-112042 A security flaw has been discovered in diem-project diem up to… CWE-94
• CVE-2026-112038 A vulnerability has been found in diem-project diem up to… CWE-94
• CVE-2026-111991 A security vulnerability has been detected in WongKinYiu yolov9 0.1. CWE-94
• CVE-2026-111986 A vulnerability was determined in AUTOMATIC1111 stable-diffusion-webui up to 1.10.1. CWE-94