CVE-2026-53577: Kestra is an open-source, event-driven orchestration platform. Prior to 1.0.45 and 1.3.21, the previewFileFromExecution endpoint (GET…

PriorityP342medium6.5CVSS 3.1

AVNACLPRLUINSUCHINAN

EPSS

0.31%

23.9th percentile

Kestra is an open-source, event-driven orchestration platform. Prior to 1.0.45 and 1.3.21, the previewFileFromExecution endpoint (GET /api/v1/{tenant}/executions/{executionId}/file/preview) contains an access control bypass that allows any authenticated user to read output files from any other execution within the same tenant, bypassing execution-level and namespace-level isolation. This vulnerability is fixed in 1.0.45 and 1.3.21.

Affected

4 ranges

Vendor	Product	Version range	Fixed in
kestra-io	kestra	< 1.0.45	1.0.45
kestra-io	kestra	—	—
kestra	kestra	< 1.0.45	1.0.45
kestra	kestra	>= 1.1.0 < 1.3.21	1.3.21

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