Kestra: Unauthenticated RCE via /configs path-suffix auth-filter bypass
Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).
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| kestra-io | kestra | affected |
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Configuration 1 [-]
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No data.
| Vendor | Product | Versions | ||||||||||||
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| Kestra-io | Kestra |
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No CVSS v4.0
No CVSS v3.0
No CVSS v2
This CVE is not in the KEV list.
Exploit prediction score: 3.3% (3.296% probability within 30 days)
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ssvc
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| First Time appeared |
Kestra-io
Kestra-io kestra |
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| Vendors & Products |
Kestra-io
Kestra-io kestra |
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| Description | 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. | |
| Title | Kestra: Unauthenticated RCE via /configs path-suffix auth-filter bypass | |
| Weaknesses | CWE-288 CWE-94 |
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| Metrics |
cvssV3_1
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