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CVE-2026-49869— Kestra: Unauthenticated Remote Code Execution via Authentication Bypass in `AuthenticationFilter`

Quick assessment

Affected
kestra-io kestra
Exploitation
Confirmed exploitation in the wild; remediate immediately
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 1.0.45之前版本和1.1.0版本至1.3.21之前版本存在输入验证错误漏洞，该漏洞源于AuthenticationFilter使用后缀匹配而非精确路径匹配来白名单配置端点，导致任何以"/configs"结尾的API路径绕过身份验证，可能导致未经身份验证的远程攻击者创建和执行任意工作流，进而实现远程代码执行。

CVSS 10.0 · Critical KEV EPSS 2.10% · P81

Affected Version Matrix 2

VendorProduct Version RangeStatus
kestra-io kestra < 1.0.45 affected
>= 1.1.0, < 1.3.21 affected
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I. Basic Information for CVE-2026-49869

Vulnerability Information
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Vulnerability Title
Kestra: Unauthenticated Remote Code Execution via Authentication Bypass in `AuthenticationFilter`
Source: CVE Program / CVE List V5
Vulnerability Description
Kestra is an open-source, event-driven orchestration platform. Prior to 1.0.45 and 1.3.21, AuthenticationFilter in Kestra OSS uses request.getPath().endsWith("/configs") to whitelist the public configuration endpoint from Basic Auth. Because the check is a suffix match rather than an exact path match, any API path whose last segment is configs bypasses authentication entirely. An unauthenticated remote attacker can exploit this to create and execute arbitrary workflows without credentials. Because Kestra ships with script execution plugins (plugin-script-shell, plugin-script-python, etc.) enabled by default, this directly results in unauthenticated Remote Code Execution as root inside the Kestra worker container. This vulnerability is fixed in 1.0.45 and 1.3.21.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
OS命令中使用的特殊元素转义处理不恰当(OS命令注入)
Source: CVE Program / CVE List V5
Vulnerability Title
kestra-io Kestra 输入验证错误漏洞
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 1.0.45之前版本和1.1.0版本至1.3.21之前版本存在输入验证错误漏洞，该漏洞源于AuthenticationFilter使用后缀匹配而非精确路径匹配来白名单配置端点，导致任何以"/configs"结尾的API路径绕过身份验证，可能导致未经身份验证的远程攻击者创建和执行任意工作流，进而实现远程代码执行。
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-2026-49869

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Qwen3.6-35B-A3B · 10916 chars
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III. Intelligence Information for CVE-2026-49869

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Vendor Advisories for CVE-2026-49869 (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-2026-55069 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-2026-49984 7.7 HIGH Kestra: Path traversal in `LocalStorage` allows any authenticated user to read arbitrary s
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-78

V. Comments for CVE-2026-49869

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