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CVE-2026-3514— Authentication Bypass in prefecthq/prefect

Quick assessment

Affected
prefecthq prefecthq/prefect
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Prefect是Prefect开源的一款工作流编排工具，使开发人员能够构建、观察数据管道并对数据管道做出反应。 Prefect 3.6.19版本存在安全漏洞，该漏洞源于对健康检查探针的URL路径豁免处理不当，可能导致攻击者创建以health或ready结尾的资源并绕过身份验证访问，泄露存储在Prefect Variables中的API密钥和数据库凭据等敏感信息。

AI Predicted 9.1 Difficulty: Trivial EPSS 0.48% · P39

Affected Version Matrix 1

VendorProduct Version RangeStatus
prefecthq prefecthq/prefect unspecified< 3.6.22 affected
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I. Basic Information for CVE-2026-3514

Vulnerability Information
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Vulnerability Title
Authentication Bypass in prefecthq/prefect
Source: CVE Program / CVE List V5
Vulnerability Description
In version 3.6.19 of prefecthq/prefect, an authentication bypass vulnerability exists due to the improper handling of URL path exemptions for health check probes. Specifically, the authentication middleware exempts any URL path ending with 'health' or 'ready' from authentication checks. This allows an attacker to create resources with names ending in 'health' or 'ready' and access them without authentication. Affected endpoints include those for variables, flows, work pools, work queues, and deployments. This vulnerability can lead to unauthorized access to sensitive information, such as API keys and database credentials, stored in Prefect Variables.
Source: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
授权机制不正确
Source: CVE Program / CVE List V5
Vulnerability Title
Prefect 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Prefect是Prefect开源的一款工作流编排工具，使开发人员能够构建、观察数据管道并对数据管道做出反应。 Prefect 3.6.19版本存在安全漏洞，该漏洞源于对健康检查探针的URL路径豁免处理不当，可能导致攻击者创建以health或ready结尾的资源并绕过身份验证访问，泄露存储在Prefect Variables中的API密钥和数据库凭据等敏感信息。
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
prefecthq prefecthq/prefect unspecified ~ 3.6.22 -

II. Public POCs for CVE-2026-3514

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III. Intelligence Information for CVE-2026-3514

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Patches & Fixes for CVE-2026-3514 (1)

Vendor Advisories for CVE-2026-3514 (1)

IV. Related Vulnerabilities

Same product: prefecthq/prefect
Same vendor: prefecthq
Same weakness: CWE-863

V. Comments for CVE-2026-3514

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