Auth bypass in Fccview Cronmaster
CVE-2026-34072
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.
Vulnerability class: Broken Authentication
Published · last modified .
CVSS v3 metric
CVSS v3 base score 8.3 (High). Vector: CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:L.
EPSS exploit prediction
EPSS: 0.009 (58.3th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 58th percentile — 58.3% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.004 · newest: 0.009 · change: +0.005
Affected products
- Fccview Cronmaster — versions < 2.2.0
Weakness classification (CWE)
References
- github.com/fccview/cronmaster/security/advisories/GHSA-9whh-mffv-xvh6 (Vendor Advisory)
- github.com/fccview/cronmaster/releases/tag/2.2.0 (Release Notes)
Frequently asked questions
- What is CVE-2026-34072?
- CVE-2026-34072 is a high-severity vulnerability in Fccview Cronmaster, classified under Improper Authentication. CVSS score: 8.3/10. Published 2026-04-01.
- How severe is CVE-2026-34072?
- High severity. CVSS v3 base score is 8.3 out of 10.