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Description

Kestra is an open-source, event-driven orchestration platform. Prior to versions 1.3.19, 1.2.19, 1.1.19, and 1.0.43, Kestra task `inputFiles` writes rendered file names directly under the task working directory. When a flow forwards untrusted execution or webhook data into an `inputFiles` file name, a caller can use `../` path segments to create or overwrite files outside that task working directory on the worker filesystem. Versions 1.3.19, 1.2.19, 1.1.19, and 1.0.43 patch the issue.

PUBLISHED Reserved 2026-05-20 | Published 2026-06-19 | Updated 2026-06-19 | Assigner GitHub_M




MEDIUM: 6.5CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:L

Problem types

CWE-22: Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')

Product status

< 1.0.43
affected

>= 1.1.0, < 1.1.19
affected

>= 1.2.0, < 1.2.19
affected

>= 1.3.0, < 1.3.19
affected

References

github.com/...kestra/security/advisories/GHSA-q3fw-mvgv-pjr2

cve.org (CVE-2026-48129)

nvd.nist.gov (CVE-2026-48129)

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