CVE-2026-53577
Published:June 26, 2026
Updated:June 29, 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.
Affected Packages
https://github.com/kestra-io/kestra.git (GITHUB):
Affected version(s) >=v1.3.0 <v1.3.21Fix Suggestion:
Update to version v1.3.21https://github.com/kestra-io/kestra.git (GITHUB):
Affected version(s) >=v1.0.0 <v1.0.45Fix Suggestion:
Update to version v1.0.45io.kestra:core (JAVA):
Affected version(s) >=1.0.0 <1.0.45Fix Suggestion:
Update to version 1.0.45io.kestra:core (JAVA):
Affected version(s) >=1.3.0 <1.3.21Fix Suggestion:
Update to version 1.3.21Related Resources (1)
Do you need more information?
Contact UsCVSS v4
Base Score:
7.1
Attack Vector
NETWORK
Attack Complexity
LOW
Attack Requirements
NONE
Privileges Required
LOW
User Interaction
NONE
Vulnerable System Confidentiality
HIGH
Vulnerable System Integrity
NONE
Vulnerable System Availability
NONE
Subsequent System Confidentiality
NONE
Subsequent System Integrity
NONE
Subsequent System Availability
NONE
CVSS v3
Base Score:
6.5
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
NONE
Availability
NONE
Weakness Type (CWE)
Incorrect Authorization
EPSS
Base Score:
0.27