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CVE-2026-34072— cronmaster: Middleware authentication bypass enabling unauthorized page access and server-action execution

Quick assessment

Affected
fccview cronmaster
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.

cronmaster是fccview个人开发者的一个基于Web的Cron任务管理与系统监控工具。 cronmaster 2.2.0之前版本存在安全漏洞，该漏洞源于中间件存在身份验证绕过，当中间件的会话验证获取失败时，带有无效会话Cookie的未经验证请求会被视为已认证，可能导致未经授权访问受保护页面和执行特权Next.js服务器操作。

CVSS 8.3 · High EPSS 0.44% · P37
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I. Basic Information for CVE-2026-34072

Vulnerability Information
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Vulnerability Title
cronmaster: Middleware authentication bypass enabling unauthorized page access and server-action execution
Source: CVE Program / CVE List V5
Vulnerability Description
Cr*nMaster (cronmaster) is a Cronjob management UI with human readable syntax, live logging and log history for cronjobs. Prior to version 2.2.0, an authentication bypass in middleware allows unauthenticated requests with an invalid session cookie to be treated as authenticated when the middleware’s session-validation fetch fails. This can result in unauthorized access to protected pages and unauthorized execution of privileged Next.js Server Actions. This issue has been patched in version 2.2.0.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:L
Source: CVE Program / CVE List V5
Vulnerability Type
认证机制不恰当
Source: CVE Program / CVE List V5
Vulnerability Title
cronmaster 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
cronmaster是fccview个人开发者的一个基于Web的Cron任务管理与系统监控工具。 cronmaster 2.2.0之前版本存在安全漏洞，该漏洞源于中间件存在身份验证绕过，当中间件的会话验证获取失败时，带有无效会话Cookie的未经验证请求会被视为已认证，可能导致未经授权访问受保护页面和执行特权Next.js服务器操作。
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
fccview cronmaster < 2.2.0 -

II. Public POCs for CVE-2026-34072

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III. Intelligence Information for CVE-2026-34072

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Vendor Advisories for CVE-2026-34072 (1)

Vendor Pages for CVE-2026-34072 (1)

IV. Related Vulnerabilities

Same vendor: fccview
Same weakness: CWE-287

V. Comments for CVE-2026-34072

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