Vulnerability · Published Apr 7, 2026 · Assigned by GitHub_M

CVE-2026-39400Stored XSS via Job HTML/Table Output in Cronicle

Medium 5.3

In plain English

A medium-severity cross-site scripting in Cronicle from jhuckaby. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.2% (higher than 7% of all known vulnerabilities).

Severity (CVSS 4.0)5.3Medium

Exploit odds (30 days)0.2%top 92.6% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

Official description

Cronicle is a multi-server task scheduler and runner, with a web based front-end UI. Prior to 0.9.111, a non-admin user with create_events and run_events privileges can inject arbitrary JavaScript through job output fields (html.content, html.title, table.header, table.rows, table.caption). The server stores this data without sanitization, and the client renders it via innerHTML on the Job Details page. This vulnerability is fixed in 0.9.111.

Affected products (as reported)

Vendor	Product	Versions
jhuckaby	Cronicle	< 0.9.111

Weakness: CWE-79 · Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N

References

https://github.com/jhuckaby/Cronicle/security/advisories/GHSA-36q6-pwxv-j545 x_refsource_CONFIRM