Privilege Escalation via update_event Job Output in Cronicle_CVE-2026-39401

5.3 / 10

MEDIUM

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

Description

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.

Basic Information

ID CVE-2026-39401

Source GitHub_M

Published Apr 7, 2026 at 20:24

Modified Apr 8, 2026 at 16:14

Affected Product

Vendor jhuckaby

Product Cronicle

Version < 0.9.111

Affected Versions jhuckaby Cronicle < 0.9.111

CWE Classification

CWE-862

References

github.com /jhuckaby/Cronicle/security/advisories/GHSA-5j3v-cq96-xw6v

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    "published": "2026-04-07T20:24:06.418Z",
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