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CVE-2026-27955— Coolify: Command Injection via Single-Quote Breakout in `executeInDocker()`

Quick assessment

Affected
coollabsio coolify
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

coolLabs Coolify是coolLabs团队开源的一个开源和自托管的 Heroku/Netlify/Vercel 替代品。 CoolLabs Coolify 4.0.0-beta.464之前版本存在命令注入漏洞，该漏洞源于executeInDocker()助手在bash -c '{$command}'中未转义单引号，用户控制的docker_compose_custom_build_command和docker_compose_custom_start_command字段直接插值，可能导致单引号跳

CVSS 6.6 · Medium EPSS 0.40% · P31

Affected Version Matrix 1

VendorProduct Version RangeStatus
coollabsio coolify < 4.0.0-beta.464 affected
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I. Basic Information for CVE-2026-27955

Vulnerability Information
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Vulnerability Title
Coolify: Command Injection via Single-Quote Breakout in `executeInDocker()`
Source: CVE Program / CVE List V5
Vulnerability Description
Coolify is an open-source and self-hostable tool for managing servers, applications, and databases. Prior to 4.0.0-beta.464, the executeInDocker() helper wraps commands in bash -c '{$command}' without escaping single quotes. User-controlled docker_compose_custom_build_command and docker_compose_custom_start_command fields are interpolated directly, allowing a single quote to break out of the bash -c argument and execute commands on the managed server host (outside the intended Docker container context). This vulnerability is fixed in 4.0.0-beta.464.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:L/I:L/A:L
Source: CVE Program / CVE List V5
Vulnerability Type
OS命令中使用的特殊元素转义处理不恰当(OS命令注入)
Source: CVE Program / CVE List V5
Vulnerability Title
CoolLabs Coolify 命令注入漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
coolLabs Coolify是coolLabs团队开源的一个开源和自托管的 Heroku/Netlify/Vercel 替代品。 CoolLabs Coolify 4.0.0-beta.464之前版本存在命令注入漏洞，该漏洞源于executeInDocker()助手在bash -c '{$command}'中未转义单引号，用户控制的docker_compose_custom_build_command和docker_compose_custom_start_command字段直接插值，可能导致单引号跳
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
coollabsio coolify < 4.0.0-beta.464 -

II. Public POCs for CVE-2026-27955

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III. Intelligence Information for CVE-2026-27955

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Vendor Advisories for CVE-2026-27955 (1)

Same Patch Batch · coollabsio · 2026-06-30 · 6 CVEs total

CVE-2026-27957 8.8 HIGH Coolify: Authenticated RCE via command injection in CA certificate management feature
CVE-2026-27883 5.0 MEDIUM Coolify: IDOR in Deployment API - Cross-Team Deployment Information Disclosure
CVE-2026-27881 5.0 MEDIUM Coolify: Cross-team deployment information disclosure via GET /api/v1/deployments/{uuid} (
CVE-2026-27882 4.8 MEDIUM Coolify: Timing Attack in GitLab Webhook Token Validation
CVE-2026-27956 4.3 MEDIUM Coolify: Cross-team application domain enumeration via domains_by_server endpoint

IV. Related Vulnerabilities

Same product: coolify
Same vendor: coollabsio
Same weakness: CWE-78

V. Comments for CVE-2026-27955

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