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CVE-2026-49984— Kestra: Path traversal in `LocalStorage` allows any authenticated user to read arbitrary server files via the execution file-download API (`\..\` bypasses the `..` guard)

Quick assessment

Affected
kestra-io kestra
Exploitation
Public or AI PoC available; prioritize validation
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

kestra是Kestra公司开源的一个工作流自动化平台。 kestra-io kestra存在安全漏洞，该漏洞源于内部存储后端在处理路径时先验证用户提供的路径是否存在“..”遍历，然后将Windows风格反斜杠转换为正斜杠，导致攻击者使用反斜杠绕过路径验证。以下版本受到影响：1.0.45之前版本、1.1.0至1.3.23之前版本。

CVSS 7.7 · High EPSS 0.57% · P45

Affected Version Matrix 2

VendorProduct Version RangeStatus
kestra-io kestra < 1.0.45 affected
>= 1.1.0, < 1.3.23 affected
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I. Basic Information for CVE-2026-49984

Vulnerability Information
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Vulnerability Title
Kestra: Path traversal in `LocalStorage` allows any authenticated user to read arbitrary server files via the execution file-download API (`\..\` bypasses the `..` guard)
Source: CVE Program / CVE List V5
Vulnerability Description
Kestra is an open-source, event-driven orchestration platform. Prior to 1.0.45 and 1.3.23, the local internal-storage backend validates user-supplied paths for .. traversal before it converts Windows-style backslashes to forward slashes. An attacker can therefore smuggle a traversal sequence past the guard using backslashes (..\..\..\); the guard sees a harmless string, and the path is only rewritten to ../../../ after validation, immediately before the file is opened. Any authenticated user who can view an execution (the lowest-privilege role) can call GET /api/v1/{tenant}/executions/{executionId}/file?path=… and read any file on the server filesystem readable by the Kestra process, outside the storage sandbox and across every tenant and namespace. This includes the embedded H2 database (all flows, all users, all stored secrets), internal storage of every other tenant/namespace, mounted secret files, and the process environment (/proc/self/environ) which contains configured database and secret-backend credentials. It is a complete breach of Kestra's storage isolation and multi-tenancy boundary. This vulnerability is fixed in 1.0.45 and 1.3.23.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
对路径名的限制不恰当(路径遍历)
Source: CVE Program / CVE List V5
Vulnerability Title
kestra-io kestra 处理逻辑错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
kestra是Kestra公司开源的一个工作流自动化平台。 kestra-io kestra存在安全漏洞，该漏洞源于内部存储后端在处理路径时先验证用户提供的路径是否存在“..”遍历，然后将Windows风格反斜杠转换为正斜杠，导致攻击者使用反斜杠绕过路径验证。以下版本受到影响：1.0.45之前版本、1.1.0至1.3.23之前版本。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
kestra-io kestra < 1.0.45 -

II. Public POCs for CVE-2026-49984

# POC Description Source Link Shenlong Link
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Qwen3.6-35B-A3B · 8599 chars
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III. Intelligence Information for CVE-2026-49984

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Vendor Advisories for CVE-2026-49984 (1)

Same Patch Batch · kestra-io · 2026-06-26 · 6 CVEs total

CVE-2026-53576 10.0 CRITICAL Kestra: Unauthenticated RCE via /configs path-suffix auth-filter bypass
CVE-2026-49869 10.0 CRITICAL Kestra: Unauthenticated Remote Code Execution via Authentication Bypass in `Authentication
CVE-2026-55069 8.7 HIGH Kestra BasicAuth Password Stored as SHA-512 Enables Offline Brute-Force Attack
CVE-2026-45807 7.7 HIGH Kestra: Path traversal via URL-encoded "%2E%2E" in execution and namespace file endpoints
CVE-2026-53577 6.5 MEDIUM Kestra: Cross-Execution File Read via Preview Endpoint (IDOR)

IV. Related Vulnerabilities

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

V. Comments for CVE-2026-49984

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