CVE-2026-53577

MEDIUM

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

Title source: cna
STIX 2.1

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.

References (1)

Core 1
Core References

Scores

CVSS v3 6.5
EPSS 0.0031
EPSS Percentile 23.6%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

CISA SSVC

Vulnrichment
Exploitation poc
Automatable no
Technical Impact partial

Details

CWE
CWE-863
Status published
Products (3)
kestra/kestra < 1.0.45
kestra-io/kestra < 1.0.45
kestra-io/kestra >= 1.1.0, < 1.3.21
Published Jun 26, 2026
Tracked Since Jun 27, 2026