# CVE-2026-42204 — coollabsio coolify

> As of 2026-07-07, CVE-2026-42204 is a HIGH-severity vulnerability in coollabsio coolify, CVSS v3.1 8.8, EPSS 0.3% (27.9th percentile). No Threadlinqs-tracked threat campaign has been attributed to CVE-2026-42204 as of 2026-07-07; the identifier is re-checked against the Threadlinqs threat corpus on every daily ingest.

**Last updated:** 2026-07-07

## What is CVE-2026-42204?

Coolify is an open-source and self-hostable tool for managing servers, applications, and databases. From 4.0.0-beta.471 through 4.0.0-beta.473, a regression in SHELL_SAFE_COMMAND_PATTERN allowed ampersands in custom Docker Compose build, start, and pre/post-deployment command fields, allowing an authenticated team member to inject shell commands that execute on the host. This issue is fixed in version 4.0.0-beta.474.

The record classifies CVE-2026-42204 under weakness class [CWE-78](https://intel.threadlinqs.com/cwe/CWE-78). Its CVSS v3 base vector states that the flaw is reachable remotely over the network, needs low-privilege credentials, needs no user interaction, and has high impact on confidentiality, integrity, availability. 1 affected-product entry is recorded, across 1 vendor, listed below. The identifier was first published 91 days ago.

## Severity and exploitation probability

- **CVSS v3.1 base score:** 8.8 — HIGH (`CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H`)
- **EPSS (FIRST):** 0.3% probability of exploitation in the next 30 days, higher than 27.9% of all scored CVEs
- **CISA KEV:** Not listed in the CISA Known Exploited Vulnerabilities catalog
- **Threadlinqs priority:** 5.5/10 — a Threadlinqs composite of the CVSS base score, the EPSS percentile and public exploit availability
- **Published:** 2026-07-06, last modified 2026-07-07

## Is CVE-2026-42204 being exploited?

It currently carries a trending score of 36 in the Threadlinqs vulnerability feed.

## Affected products and versions

- [coollabsio](https://intel.threadlinqs.com/vendors/coollabsio): coolify

## How to fix CVE-2026-42204

No vendor patch reference has been recorded for CVE-2026-42204 in the tracked sources. Follow the references below for a fix, and treat the products listed above as exposed until the vendor states otherwise.

## Threat activity tracking CVE-2026-42204

No threat campaign in the Threadlinqs corpus currently references CVE-2026-42204, in its CVE list or as an indicator. The linkage is recomputed from the live corpus on every daily ingest, so this section fills in as soon as a tracked campaign cites the identifier.

## Sources

Enriched from CVE.org, NVD, FIRST EPSS. Last verified by Threadlinqs on 2026-07-08. This product uses the NVD API but is not endorsed or certified by the NVD.

**Vendor advisory and patch**

- [github.com](https://github.com/coollabsio/coolify/security/advisories/GHSA-chg4-63hm-xv9x)

**Other references**

- [github.com](https://github.com/coollabsio/coolify/pull/9684)
- [github.com (e1aac50b745cf499e710b7e35cd2a9d6a1538dd9)](https://github.com/coollabsio/coolify/commit/e1aac50b745cf499e710b7e35cd2a9d6a1538dd9)
- [github.com (v4.0.0 beta)](https://github.com/coollabsio/coolify/releases/tag/v4.0.0-beta.474)

Canonical: https://intel.threadlinqs.com/cve/CVE-2026-42204
Full detection coverage and IOCs for threats exploiting CVE-2026-42204 via the Threadlinqs MCP server (Purple tier): https://intel.threadlinqs.com/mcp