🛡️ CVE-2026-39401 — cronicle

🟡 CVSS 5.4 — Medium ⚠️ Exploit Public CWE-862 NVD
5.4
CVSS Score
0 Low4 Medium7 High9 Critical10

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.

How this vulnerability can be exploited

This issue can be reached over the network, attack complexity is low, an attacker needs low-level privileges on the target. No user interaction is required. The scope is unchanged, so the impact stays within the vulnerable component. Rated impact: confidentiality low, integrity low, availability none.

Weakness class

CVE-2026-39401 is classified as CWE-862: Missing Authorization. No authorisation check is performed before carrying out a restricted action.

Affected software

CVE-2026-39401 is recorded against 1 package.

  • cronicle (fixed in 0.9.111)

Timeline and source

Published on 7 April 2026 and last revised on 20 July 2026. A public exploit is known to exist, which raises the urgency of patching considerably. Record sourced from NVD.

References

github.com
github.com

Details

Severity MEDIUM
CVSS Score 5.4
CVSS Vector CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N
CWE CWE-862
Public Exploit ⚠️ Yes
Source NVD
Published 2026-04-07
Updated 2026-08-20
Modified 2026-07-20
Fix URL N/A

Affected Packages

Software From version Fixed in
cronicle — 0.9.111

Similar Threats

Exploit Protection

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CVE-2026-39401 carries CVSS 5.4 Medium rating and a public exploit already exists. BotEraser checks your installation against this and other known CVE records, and blocks IPs associated with exploit activity.

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