---
id: CVE-2026-120203
title: ShowDoc 2.8.14 before 3.9.6 Code Injection via Mock Templates
summary: >-
  ShowDoc 2.8.14 before 3.9.6 contains a code injection vulnerability in its
  Mock feature that allows authenticated users to execute shell commands through
  mockjs templates. Attackers can store a template via MockController::add with
  escap…
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-94
vendor: ShowDoc
product: ShowDoc
affected:
  - ShowDoc >= 2.8.14 < 3.9.6
published: '2026-10-31'
updated: '2026-10-31'
sourceUpdated: '2026-10-31T17:25:52.170Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-120203'
references:
  - url: >-
      https://github.com/star7th/showdoc/commit/5a2087a3f408f5266f61e9e2fb98845ef4788288
    label: Patch Commit
  - url: 'https://gist.github.com/LioTree/028af150fd991cf9924dd2c7d5912e54'
  - url: 'https://github.com/star7th/showdoc/blob/v3.9.5/mock/index.js#L42'
  - url: 'https://github.com/star7th/showdoc'
  - url: >-
      https://www.vulncheck.com/advisories/showdoc-2.8.14-before-3.9.6-code-injection-via-mock-templates
    label: >-
      VulnCheck Advisory: ShowDoc 2.8.14 before 3.9.6 Code Injection via Mock
      Templates
tags:
  - cve.org
epss: 0.00352
epssPercentile: 0.28971
ingestedAt: '2026-11-05T17:27:38.378Z'
---

## Overview

ShowDoc 2.8.14 before 3.9.6 contains a code injection vulnerability in its Mock feature that allows authenticated users to execute shell commands through mockjs templates. Attackers can store a template via MockController::add with escaped parentheses that mockjs evaluates with eval(), then trigger it through MockController::infoByKey to run commands, as root in the official Docker image.

## Affected

- `ShowDoc >= 2.8.14 < 3.9.6`

## Remediation

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