CVE-2026-53577 PUBLISHED

Kestra: Cross-Execution File Read via Preview Endpoint (IDOR)

Assigner: GitHub_M
Reserved: 09.06.2026 Published: 26.06.2026 Updated: 27.06.2026

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.

Metrics

CVSS Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
CVSS Score: 6.5

Product Status

Vendor kestra-io
Product kestra
Versions
  • Version < 1.0.45 is affected
  • Version >= 1.1.0, < 1.3.21 is affected

References

Problem Types

  • CWE-863: Incorrect Authorization CWE