CVE-2026-39401
Privilege Escalation via update_event Job Output in Cronicle
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.
INFO
Published Date :
April 7, 2026, 9:17 p.m.
Last Modified :
April 15, 2026, 8:23 p.m.
Remotely Exploit :
Yes !
Source :
[email protected]
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS 3.1 | MEDIUM | [email protected] | ||||
| CVSS 4.0 | MEDIUM | [email protected] |
Solution
- Update Cronicle to version 0.9.111 or later.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2026-39401.
| URL | Resource |
|---|---|
| https://github.com/jhuckaby/Cronicle/security/advisories/GHSA-5j3v-cq96-xw6v | Exploit Vendor Advisory |
| https://github.com/jhuckaby/Cronicle/security/advisories/GHSA-5j3v-cq96-xw6v | Exploit Vendor Advisory |
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-39401 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-39401
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-39401 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-39401 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
Initial Analysis by [email protected]
Apr. 15, 2026
Action Type Old Value New Value Added CVSS V3.1 AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N Added CPE Configuration OR *cpe:2.3:a:cronicle:cronicle:*:*:*:*:*:*:*:* versions up to (excluding) 0.9.111 Added Reference Type CISA-ADP: https://github.com/jhuckaby/Cronicle/security/advisories/GHSA-5j3v-cq96-xw6v Types: Exploit, Vendor Advisory Added Reference Type GitHub, Inc.: https://github.com/jhuckaby/Cronicle/security/advisories/GHSA-5j3v-cq96-xw6v Types: Exploit, Vendor Advisory -
CVE Modified by 134c704f-9b21-4f2e-91b3-4a467353bcc0
Apr. 08, 2026
Action Type Old Value New Value Added Reference https://github.com/jhuckaby/Cronicle/security/advisories/GHSA-5j3v-cq96-xw6v -
New CVE Received by [email protected]
Apr. 07, 2026
Action Type Old Value New Value Added 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. Added CVSS V4.0 AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X Added CWE CWE-862 Added Reference https://github.com/jhuckaby/Cronicle/security/advisories/GHSA-5j3v-cq96-xw6v