{"id":"CVE-2026-53577","summary":"Kestra: Cross-Execution File Read via Preview Endpoint (IDOR)","details":"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.","aliases":["GHSA-r6v3-xxwj-9h42"],"modified":"2026-07-15T01:49:14.944678907Z","published":"2026-06-26T20:52:04.006Z","database_specific":{"cwe_ids":["CWE-863"],"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/53xxx/CVE-2026-53577.json","cna_assigner":"GitHub_M"},"references":[{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/53xxx/CVE-2026-53577.json"},{"type":"ADVISORY","url":"https://github.com/kestra-io/kestra/security/advisories/GHSA-r6v3-xxwj-9h42"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-53577"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/kestra-io/kestra","events":[{"introduced":"0"},{"fixed":"670b719eb5e0fc579ad9044551223642c24335dd"},{"introduced":"1e670b5e7e92f89533ee17d564263578b0d5ec8c"},{"fixed":"2541c53230388d76a9acc1b43245ebce31312a88"}],"database_specific":{"source":"CPE_RANGE","cpe":"cpe:2.3:a:kestra:kestra:*:*:*:*:*:*:*:*","extracted_events":[{"introduced":"0"},{"fixed":"1.0.45"},{"introduced":"1.1.0"},{"fixed":"1.3.21"}]}}],"versions":["v1.0.44","v1.3.20","v1.0.43","v1.3.19","v1.0.42","v1.3.18","v1.0.41","v1.3.17","v1.0.40","v1.3.16","v1.0.39","v1.3.15","v1.0.38","v1.3.14","v1.3.13","v1.0.37","v1.3.11","v1.0.36","v1.3.9","v1.0.35","v1.3.8","v1.3.7","v1.0.34","v1.3.6","v1.3.5","v1.3.4","v1.0.33","v1.3.3","v1.3.2","v1.0.32","v1.0.31","v1.3.1","v1.0.30","v1.3.0","v1.3.0-rc1","v1.0.29","v1.3.0-rc0","v1.0.28","v1.0.27","v1.0.26","v1.0.25","v1.0.24","v1.0.23","v1.0.22","v1.0.21","v1.0.20","v1.0.19","v1.0.18","v1.0.17","v1.0.16","v1.0.15","v1.0.14","v1.0.13","v1.0.12","v1.0.11","v1.0.10","v1.0.9","v1.0.8","v1.0.7","v1.0.6","v1.0.5","v1.0.4","v1.0.3","v1.0.2","v1.0.1","v1.0.0","v0.0.1234","v0.19.0","v0.9.1","v0.9.0","v0.8.1","v0.8.0","v0.7.1","v0.7.0"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-53577.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N"}]}