CVE-2026-53577 | Kestra is an open-source, event-driven orchestration platfor… | CVSS 6.5 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.

Metadata

CVE ID: CVE-2026-53577
State: PUBLISHED
Assigner: GitHub_M
Reserved: 2026-06-09 19:11 UTC
Published: 2026-06-26 20:52 UTC
Last updated: 2026-06-27 03:15 UTC
Primary CWE: CWE-863
CWE-863: Incorrect Authorization
Vendor / Product: kestra-io / kestra
Sources: cve.org · NVD

Severity & Metrics

6.5 MEDIUM CVSS 3.1

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

SSVC — CISA Coordinator

Exploitation: PoC
Automatable: no
Tech. Impact: partial

Affected products (1)

Vendor	Product	Platform	Versions
kestra-io	kestra	—	< 1.0.45, >= 1.1.0, < 1.3.21

Weakness (CWE)

CWE	Source	Description
CWE-863	cna	CWE-863: Incorrect Authorization

CVSS scores (1)

Score	Severity	Version	Source	Vector
6.5	MEDIUM	3.1	cna	CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

References (1)

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