CVE-2026-120203 json
ShowDoc 2.8.14 before 3.9.6 Code Injection via Mock Templates
published 2026-10-31 8 d ago modified 2026-11-06 2 d ago also EUVD-2026-114724
- cvss
- 8.8
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.4%
- EPSS 0.4% chance of exploitation in 30 days, percentile 29%
- public exploits
- 0
- none known
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 escaped parentheses that mockjs evaluates with eval(), then trigger it through MockController::infoByKey to run commands, as root in the official Docker image.
Patch / fix
CISA SSVC
- Exploitation
- none
- Automatable
- no
- Technical impact
- total
- Assessed
- 2 d ago
Exploit prediction
0.35% chance of exploitation in the next 30 days, higher than 29% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 4.0 | 8.7 | CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N |
| CNA | 3.1 | 8.8 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
| CNA | 4.0 | 8.7 | CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X |
Affected products
- ShowDoc ShowDoc
Classification
- Weakness
-
- CWE-94 Improper Control of Generation of Code
References
-
github.com
/star7th/showdoc/commit/5a2087a3f408f5266f61e9e2fb98845ef4788288
patch
-
gist.github.com
/LioTree/028af150fd991cf9924dd2c7d5912e54
technical-description
-
github.com
/star7th/showdoc/blob/v3.9.5/mock/index.js#L42
technical-description
-
github.com
/star7th/showdoc
product
-
vulncheck.com
/advisories/showdoc-2.8.14-before-3.9.6-code-injection-via-mock-templates
third-party-advisory
Sources
- CVE List CVE-2026-120203
- NVD CVE-2026-120203
Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.