CVE-2026-53577

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

State: Published
Severity: 6.5 Medium
Published: Jun 26, 2026
Updated: Jun 27, 2026
Reserved: Jun 9, 2026

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.

Scores

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

Weaknesses

CWE-863 Incorrect Authorization

Affected Products

Product	Versions
kestrakestra-io	< 1.0.45Affected >= 1.1.0, < 1.3.21Affected

References

https://github.com/kestra-io/kestra/security/advisories/GHSA-r6v3-xxwj-9h42

Every record here comes from the CVE Program’s CVE List. © 1999–2026 The MITRE Corporation. CVE is a registered trademark of The MITRE Corporation. The records are reproduced under the CVE Program terms of use.