CVE-2026-53577
Medium
Description
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.
SeverityMedium
CVSS6.5
Exploit probability—
ProductKestra
PublishedJun 26, 2026
First seenJun 26, 2026
Weakness typeCWE-863Incorrect authorization
How to fix
Update
- kestra kestra1.0.45, 1.3.21 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| kestra kestra | v < 1.0.45, 1.1.0 ≤ v < 1.3.21 | 1.0.45, 1.3.21 |
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