CVE-2026-48129

MEDIUM

Kestra task inputFiles accepts traversal filenames for worker file writes

Title source: cna
STIX 2.1

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.

References (1)

Core 1
Core References

Scores

CVSS v3 6.5
EPSS 0.0031
EPSS Percentile 22.5%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:L

CISA SSVC

Vulnrichment
Exploitation poc
Automatable no
Technical Impact partial

Details

CWE
CWE-22
Status published
Products (4)
kestra-io/kestra < 1.0.43
kestra-io/kestra >= 1.1.0, < 1.1.19
kestra-io/kestra >= 1.2.0, < 1.2.19
kestra-io/kestra >= 1.3.0, < 1.3.19
Published Jun 19, 2026
Tracked Since Jun 20, 2026