Vulnerability · Published Jun 30, 2026 · Assigned by GitHub_M

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

Medium 6.6

In plain English

A medium-severity OS command injection in coolify from coollabsio. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.3% (higher than 19% of all known vulnerabilities).

Severity (CVSS 3.1)6.6Medium

Exploit odds (30 days)0.3%top 81.2% of all CVEs

Exploited in the wildNo reportsCISA SSVC: poc

Attack toolingNoneno public tooling known

Official 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.

Affected products (as reported)

Vendor	Product	Versions
coollabsio	coolify	< 4.0.0-beta.464

Weakness: CWE-78 · Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:L/I:L/A:L

References

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