CVE-2026-120203

EUVD-2026-114724
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.
Code Injection
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
VulnCheckCNA
8.8 HIGH
NETWORK
LOW
LOW
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Base Score
CVSS 3.x
EPSS Score
Percentile: Unknown
Early Detection
Affected products identified ahead of NVD analysis through intelligence sources (CNA/ADP records, vendor advisories, Enginsight analysis).
VendorProductVersionSource
showdocshowdoc
2.8.14 ≤
𝑥
< 3.9.6
CNA
Common Weakness Enumeration
References
https://gist.github.com/LioTree/028af150fd991cf9924dd2c7d5912e54
https://github.com/star7th/showdoc
https://github.com/star7th/showdoc/blob/v3.9.5/mock/index.js#L42
https://github.com/star7th/showdoc/commit/5a2087a3f408f5266f61e9e2fb98845ef4788288
https://www.vulncheck.com/advisories/showdoc-2.8.14-before-3.9.6-code-injection-via-mock-templates