Medium 6.5Published Jun 26, 2026

CVE-2026-53577Kestra: Cross-Execution File Read via Preview Endpoint (IDOR)

Updated under an hour ago (Oct 27, 2026, 10:23 AM ET)

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It affects kestra-io kestra and 1 other product. Add what you run to find out whether that includes you.

No exploitation reported and no EPSS estimate yet.

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Exploited in the last 30 days

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.

CVSS: 6.5 MEDIUM (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
Weakness (CWE): CWE-863
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: GitHub_M
NVD analysis: Analyzed
Record last updated: Jun 26, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

kestra-io kestra kestra_io:kestra (from the name)	before 1.0.45; from 1.1.0, < 1.3.21	CNA record
kestra kestra kestra:kestra	before 1.0.45; from 1.1.0 before 1.3.21	NVD

References

References

https://github.com/kestra-io/kestra/security/advisories/GHSA-r6v3-xxwj-9h42	x-refsource-confirm, exploit, mitigation, vendor-advisory

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.