CVE-2026-48129: Kestra-Io Kestra

Medium severity, CVSS 6.5. EPSS: 0.4% chance of exploitation in the next 30 days.

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.

Affected products

• Kestra-Io Kestra: before 1.0.43 (fixed in 1.0.43); from 1.1.0, before 1.1.19 (fixed in 1.1.19); from 1.2.0, before 1.2.19 (fixed in 1.2.19); from 1.3.0, before 1.3.19 (fixed in 1.3.19)

Published 2026-06-19. Last modified 2026-06-23.