---
id: CVE-2026-58255
title: >-
  Cronicle: Non-admin uid/gid injection in create_event/update_event →
  run-as-arbitrary-user (incl. root) — sibling of CVE-2026-39401
summary: >-
  Cronicle is a multi-server task scheduler and runner, with a web based
  front-end UI. Prior to 0.9.121, a non-administrator user or scoped API key
  with `create_events` and `run_events` privileges can inject top-level `uid`
  and `gid` field…
severity: high
cvss: 8.8
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H'
cvssSource: cna
cwe:
  - CWE-269
  - CWE-862
  - CWE-915
vendor: jhuckaby
product: Cronicle
affected:
  - Cronicle < 0.9.121
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: total
  timestamp: '2026-10-28T14:58:21.748464Z'
published: '2026-10-27'
updated: '2026-10-28'
sourceUpdated: '2026-10-28T16:12:46.274Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-58255'
references:
  - url: >-
      https://github.com/jhuckaby/Cronicle/security/advisories/GHSA-9xpg-9w3g-mpwj
    label: >-
      https://github.com/jhuckaby/Cronicle/security/advisories/GHSA-9xpg-9w3g-mpwj
  - url: >-
      https://github.com/jhuckaby/Cronicle/commit/f3d3550d0f3fe89bab52d3788f0db1dd10860df2
    label: >-
      https://github.com/jhuckaby/Cronicle/commit/f3d3550d0f3fe89bab52d3788f0db1dd10860df2
  - url: 'https://github.com/jhuckaby/Cronicle/releases/tag/v0.9.121'
    label: 'https://github.com/jhuckaby/Cronicle/releases/tag/v0.9.121'
tags:
  - cve.org
epss: 0.00415
epssPercentile: 0.35681
ingestedAt: '2026-10-27T22:58:58.458Z'
---

## Overview

Cronicle is a multi-server task scheduler and runner, with a web based front-end UI. Prior to 0.9.121, a non-administrator user or scoped API key with `create_events` and `run_events` privileges can inject top-level `uid` and `gid` fields through `/api/app/create_event` or `/api/app/update_event`. In `lib/api.js`, `requireValidEventData` uses `validateOptionalParams` as a partial allow-list that silently passes unknown keys, storing the injected fields verbatim. In `lib/job.js`, `launchJob` copies the whole event into the job, and a plugin `uid` overrides the event `uid` only when the plugin defines one. The default `shellplug` and `urlplug` plugins do not define a `uid`, so the event-controlled identity survives into child-process launch. On a root-daemon installation, this lets a low-privileged user run jobs as arbitrary users, including root, bypassing the otherwise administrator-only run-as-user control. This API-side event injection is distinct from the job-output `uid`/`gid` injection addressed by CVE-2026-39401. This issue is fixed in version 0.9.121.

## Affected

- `Cronicle < 0.9.121`

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.