CVE-2026-39401CWE-862

Privilege Escalation via update_event Job Output in Cronicle

Medium · published April 7, 2026

CVSS v4.0
5.3
EPSS
0%
Percentile
16.6
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v4.0
5.3 · MEDIUM
Vector
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N
EPSS
0.00259 · 16.6th percentile
Weakness
CWE-862 · Missing Authorization
Published
2026-04-07T20:24Z
EPSS history
Timeline
  • 07 APR 20:24Z
    Privilege Escalation via update_event Job Output in Cronicle
    cvelistv5