CVE-2026-120203

High

Description

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.

SeverityHigh

CVSS8.8

Exploit probability—

ProductShowDoc

PublishedOct 31, 2026

First seenNov 4, 2026

Weakness typeCWE-94Code injection

How to fix

Update

ShowDoc ShowDoc3.9.6 or later

Patches

github.com/star7th/showdoc/commit/5a2087a3f408f5266f61e9e2fb98845ef4788288

Affected products

Product	Affected versions	Fixed in
ShowDoc ShowDoc	2.8.14 ≤ v < 3.9.6	3.9.6

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