What is the CVSS score of CVE-2026-27955?

CVE-2026-27955 has a CVSS 3.1 base score of 6.6 (Medium). CVSS vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:L/I:L/A:L. EPSS exploitation probability: 0.2%.

Is there a patch available for CVE-2026-27955?

Yes, a patch is available for CVE-2026-27955. Update the affected software to the latest version immediately.

Coolify CVE-2026-27955

EUVD-2026-40332 MEDIUM

OS Command Injection (CWE-78)

2026-06-30 GitHub_M

Docker Command Injection Coolify Coollabsio

6.6

CVSS 3.1 · Vendor: GitHub_M

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Vulnerability Assessment

Weakness

CWE

CWE-78

OWASP Top 10:2025

A05:2025 - Injection

ASVS 5.0

V1 - Encoding and Sanitization OS command sanitization, avoid shell exec

MITRE ATT&CK

2 techniques across 1 tactic: Execution

The technique list with ATT&CK links and the kill-chain view is part of the Basic plan and up.

This Month Plan within 30 days. Why: MEDIUM severity (CVSS 4.0-6.9).

Patch available 0.2% exploitation probability (EPSS)

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AnalysisAIv1 – Jul 27, 2026

Command injection in Coolify prior to 4.0.0-beta.464 allows authenticated administrators to escape the Docker container and execute arbitrary commands on the host server. The vulnerability originates from the executeInDocker() helper that wraps commands in bash -c '{$command}' without escaping single quotes, enabling injection via user-controlled Docker compose fields. A proof-of-concept exploit exists, but no active exploitation is reported (EPSS 0.22%, low risk).

Affected VersionsENISA

coolify < 4.0.0-beta.464

Affected Packages

euvd coolify fix: 4.0.0-beta.464

Source: OSV (Open Source Vulnerabilities)

Affects your stack

Affects 1 package in euvd

Checking this CVE against your own stacks and servers is part of the Basic plan and up.

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Exploit and PoC references, threat intelligence from 22 sources

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Severity by source

Vendor (GitHub_M) PRIMARY 6.6 MEDIUM

AV:N/AC:L/PR:H/UI:N/S:C/C:L/I:L/A:L

vuln.today AI 9.1 CRITICAL

PR:H reflects mandatory admin access; C/I/A raised to H because container escape enables full arbitrary code execution on the managed host.

3.1 AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H

4.0 AV:N/AC:L/AT:N/PR:H/UI:N/VC:L/VI:L/VA:L/SC:H/SI:H/SA:H

Primary rating from Vendor (GitHub_M).

CVSS VectorVendor: GitHub_M

Attack Vector

Network

Attack Complexity

Low

Privileges Required

High

User Interaction

None

Scope

Changed

Confidentiality

Low

Integrity

Low

Availability

Low

Lifecycle Timeline

Patch available

Jun 30, 2026 - 16:01 EUVD

DescriptionCVE.org

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.

Threat Intelligence Overview

EPSS Score

0.2%

Top 87% exploitable

Data Quality

6 sources

Confidence: High

EUVD

NVD

CVE.org

EPSS

Vulnrichment

GitHub

How this decision was reached

The engine reads each signal below and applies a fixed list of rules from top to bottom. The first rule that matches sets the recommended action – like a statement, every line is shown.

SignalValue

Severity MEDIUM

CISA KEV No

Public POC No

EPSS 0.2%

Patch available Yes

Active threat No

Deciding rule

MEDIUM severity (CVSS 4.0-6.9)

What every action level means

Emergency Immediate action required. Criteria: CRITICAL + in CISA KEV (actively exploited) without patch, OR CRITICAL + EPSS > 30% without patch, OR CRITICAL + active threat signals without patch.

Act Now Prioritize within 24-48h. Criteria: in KEV with patch available, OR CRITICAL + public POC, OR HIGH + EPSS > 10%, OR CRITICAL + active threat, OR any CRITICAL severity.

This Week Schedule remediation this week. Criteria: HIGH severity (CVSS 7.0-8.9). Patch within normal change window.

This Month Plan within 30 days. Criteria: MEDIUM severity (CVSS 4.0-6.9), lower exploitation probability. Include in regular patch cycle.

Monitor Track and reassess. Criteria: LOW severity (CVSS 0.1-3.9), minimal exploitation risk. No immediate action needed.

SSVC AssessmentENISA

SSVC Decision· derived

Scheduled

Exploitation

Poc

System Exposure· derived

Open

Automatable

Human Impact· derived

Medium

Technical Impact

Partial

Priority Score

Low Medium High Critical

KEV: 0

EPSS: 0

CVSS: +33

PoC: 0

Weaponized: 0

Threat intel: 0

Gov advisory: 0

Attack Technique

OS Command Injection CRITICAL

OS command injection occurs when an application passes unsanitized user input directly into system shell commands.

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References

Advisories & patches

REF https://github.com/coollabsio/coolify/security/advisories/GHSA-6h8g-wpxp-cq98

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GitHub PoC

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