CVE-2026-53577 json
Kestra: Cross-Execution File Read via Preview Endpoint (IDOR)
published 2026-06-26 4 mo ago modified 2026-10-25 14 d ago also EUVD-2026-39918
- cvss
- 6.5
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.4%
- EPSS 0.4% chance of exploitation in 30 days, percentile 38%
- public exploits
- 0
- none known
Summary
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.
Patch / fix
- io.kestra kestra 1.0.45, 1.3.21
- kestra kestra 1.0.45, 1.3.21
CISA SSVC
- Exploitation
- Proof of concept is public
- Automatable
- no
- Technical impact
- partial
- Assessed
- 4 mo ago
Exploit prediction
0.44% chance of exploitation in the next 30 days, higher than 38% of all scored CVEs (FIRST EPSS, 2026-11-08).
Exploits and checks
- github.com https://github.com/kestra-io/kestra/security/advisories/GHSA-r6v3-xxwj-9h42 referenced PoC, tagged "exploit" by a source, unverified
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 6.5 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N |
Affected products
- kestra-io kestra
Classification
- Weakness
-
- CWE-863 Incorrect Authorization
References
-
github.com
/kestra-io/kestra/security/advisories/GHSA-r6v3-xxwj-9h42
exploit, mitigation, vendor-advisory
Sources
- CVE List CVE-2026-53577
- NVD CVE-2026-53577
Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.
CPEs and fixed versions use Anchore's correction of NVD's data: Added CPE configurations because not yet analyzed by NVD.