by Kastro
Paper/Archive/CVE-2026-34072

CVE-2026-34072

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

EPSS 0.5%CVSS 9.8
critical.is priorityof 100
37
CVSS 9.8 (NVD)9.8 / 10 × 3029.4Not in CISA KEV+300.0EPSS percentile 40.2.402 × 208.0No public exploit+100.0SSVC exploitation: none+100.0
Description · from the CVE record

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.

Affected

ProductAffectedFixed inSource
cronmaster< 2.2.0–CNA

Scores by source

NVD9.8CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
GitHub_M (CNA)8.3CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:L
CISA ADPSSVCExploitation: none · Automatable: no · Technical impact: total

References

refgithub.com/fccview/cronmaster/security/advisories/GHSA-9whh-mffv-xvh6refgithub.com/fccview/cronmaster/releases/tag/2.2.0