cronmaster: Middleware authentication bypass enabling unauthorized page access and server-action execution

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Summary

CVECVE-2026-34072
StatePUBLISHED
AssignerGitHub_M
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-04-01 18:16:29 UTC
Updated2026-06-02 15:59:04 UTC
DescriptionCr*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.

Risk And Classification

Primary CVSS: v3.1 9.8 CRITICAL from [email protected]

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

EPSS: 0.000980000 probability, percentile 0.269770000 (date 2026-06-02)

Problem Types: CWE-287 | CWE-306 | CWE-693 | CWE-287 CWE-287: Improper Authentication | CWE-306 CWE-306: Missing Authentication for Critical Function | CWE-693 CWE-693: Protection Mechanism Failure

VersionSourceTypeScoreSeverityVector
3.1[email protected]Primary9.8CRITICALCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
3.1[email protected]Secondary8.3HIGHCVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:L
3.1CNADECLARED8.3HIGHCVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:L

CVSS v3.1 Breakdown

Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

NVD Known Affected Configurations (CPE 2.3)

TypeVendorProductVersionUpdateEditionLanguage
Application Fccview Cronmaster All All All All

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Fccview Cronmaster affected < 2.2.0 Not specified

References

ReferenceSourceLinkTags
github.com/fccview/cronmaster/releases/tag/2.2.0 [email protected] github.com Release Notes
github.com/fccview/cronmaster/security/advisories/GHSA-9whh-mffv-xvh6 [email protected] github.com Vendor Advisory
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