CVE-2026-39401: Cronicle

Medium severity, CVSS 5.4. EPSS: 0.3% chance of exploitation in the next 30 days.

Cronicle is a multi-server task scheduler and runner, with a web based front-end UI. Prior to 0.9.111, jb child processes can include an update_event key in their JSON output. The server applies this directly to the parent event's stored configuration without any authorization check. A low-privilege user who can create and run events can modify any event property, including webhook URLs and notification emails. This vulnerability is fixed in 0.9.111.

Affected products

• Cronicle Cronicle: before 0.9.111 (fixed in 0.9.111)

Published 2026-04-07. Last modified 2026-07-20.