Vulnerability · Published Apr 1, 2026 · Assigned by GitHub_M

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

High 8.3

In plain English

A high-severity improper authentication in cronmaster from fccview. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.5% (higher than 40% of all known vulnerabilities).

Severity (CVSS 3.1)8.3High

Exploit odds (30 days)0.5%top 59.6% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

Official 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.

Affected products (as reported)

Vendor	Product	Versions
fccview	cronmaster	< 2.2.0

Weakness: CWE-287, CWE-306, CWE-693 · Vector: CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:L

References

https://github.com/fccview/cronmaster/security/advisories/GHSA-9whh-mffv-xvh6 x_refsource_CONFIRM
https://github.com/fccview/cronmaster/releases/tag/2.2.0 x_refsource_MISC