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CVE-2026-48129— Kestra task inputFiles accepts traversal filenames for worker file writes

CVSS 6.5 · Medium EPSS 0.31% · P22

Possible ATT&CK Techniques 1AI

T1083 · File and Directory Discovery
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I. Basic Information for CVE-2026-48129

Vulnerability Information
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Vulnerability Title
Kestra task inputFiles accepts traversal filenames for worker file writes
Source: NVD (National Vulnerability Database)
Vulnerability 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.
Source: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:L
Source: NVD (National Vulnerability Database)
Vulnerability Type
对路径名的限制不恰当(路径遍历)
Source: NVD (National Vulnerability Database)

Affected Products

VendorProductAffected VersionsCPESubscribe
kestra-iokestra < 1.0.43 -

II. Public POCs for CVE-2026-48129

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III. Intelligence Information for CVE-2026-48129

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Vendor Advisories for CVE-2026-48129 (1)

IV. Related Vulnerabilities

Same product: kestra
Same vendor: kestra-io
Same weakness: CWE-22

V. Comments for CVE-2026-48129

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