CVE-2026-32885: DDEV Path Traversal Vulnerability

CVE-2026-32885 Overview

CVE-2026-32885 is a Path Traversal vulnerability affecting DDEV, an open-source tool for running local web development environments for PHP and Node.js. The vulnerability exists in versions prior to 1.25.2 due to unsanitized extraction in both the Untar() and Unzip() functions located in pkg/archive/archive.go. The flaw allows DDEV to download and extract archives from remote sources without proper path validation, potentially enabling an attacker to write files to arbitrary locations on the file system.

Critical Impact

Attackers can exploit this path traversal vulnerability to write arbitrary files outside the intended extraction directory, potentially overwriting critical configuration files or placing malicious executables in sensitive locations.

Affected Products

• DDEV versions prior to 1.25.2

Discovery Timeline

• 2026-04-22 - CVE CVE-2026-32885 published to NVD
• 2026-04-22 - Last updated in NVD database

Technical Details for CVE-2026-32885

Vulnerability Analysis

This vulnerability falls under CWE-22 (Improper Limitation of a Pathname to a Restricted Directory), commonly known as Path Traversal. The core issue lies in how DDEV handles archive extraction operations. When processing tar and zip archives from remote sources, the Untar() and Unzip() functions in pkg/archive/archive.go fail to properly sanitize file paths contained within the archive.

In a typical path traversal attack against archive extraction, an attacker crafts a malicious archive containing files with specially constructed path names that include directory traversal sequences such as ../ (dot-dot-slash). When such an archive is extracted without proper validation, files can be written to locations outside the intended destination directory.

The vulnerability requires user interaction—a user must be tricked into using DDEV with a malicious archive or repository that contains the crafted archive. Once exploited, the impact is primarily to integrity, as arbitrary files can be written or overwritten on the target system.

Root Cause

The root cause of this vulnerability is missing input validation in the archive extraction functions. The Untar() and Unzip() functions in pkg/archive/archive.go do not verify that extracted file paths remain within the intended destination directory. This allows maliciously crafted archive entries with path traversal sequences (e.g., ../../etc/cron.d/malicious) to escape the extraction boundary and write files to arbitrary filesystem locations.

Attack Vector

The attack vector is network-based. An attacker can exploit this vulnerability by hosting a malicious archive on a remote server and convincing a user to download and extract it using DDEV. This could occur through:

1. A compromised or malicious DDEV add-on repository
2. A social engineering attack directing users to import a malicious project
3. A supply chain attack where a legitimate-looking development environment contains a crafted archive

The vulnerability mechanism works as follows: When DDEV downloads and extracts an archive containing a file entry with a path like ../../../../tmp/malicious_file, the extraction function processes this path without sanitization, causing the file to be written outside the intended extraction directory.

Detection Methods for CVE-2026-32885

Indicators of Compromise

• Unexpected files appearing in directories outside of DDEV project paths
• Modified system configuration files that were not intentionally changed
• Presence of files with unusual timestamps in sensitive directories following DDEV archive operations
• Log entries showing archive extraction operations followed by suspicious file system activity

Detection Strategies

• Monitor file system operations during DDEV archive extraction for writes outside expected directories
• Implement file integrity monitoring (FIM) on critical system directories to detect unauthorized modifications
• Review DDEV logs for archive downloads from untrusted or unfamiliar sources
• Use endpoint detection and response (EDR) solutions to track file creation events correlated with DDEV processes

Monitoring Recommendations

• Enable verbose logging for DDEV operations to capture archive extraction activities
• Configure alerts for file writes to sensitive system directories by DDEV-related processes
• Monitor network traffic for DDEV downloading archives from unknown or suspicious domains
• Implement behavioral analysis to detect anomalous file system patterns during development tool execution

How to Mitigate CVE-2026-32885

Immediate Actions Required

• Upgrade DDEV to version 1.25.2 or later immediately
• Review systems where vulnerable DDEV versions were used for signs of compromise
• Audit any archives that were recently extracted using vulnerable DDEV versions
• Restrict DDEV usage to trusted archive sources until the upgrade is complete

Patch Information

DDEV version 1.25.2 patches this vulnerability by implementing proper path validation in the Untar() and Unzip() functions. The fix ensures that all extracted file paths are validated to remain within the intended destination directory, rejecting any entries that attempt directory traversal. For detailed patch information, see the GitHub Release Note v1.25.2 and the GitHub Security Advisory GHSA-x2xq-qhjf-5mvg.

Workarounds

• Avoid using DDEV to extract archives from untrusted or unverified sources until upgrade is applied
• Manually inspect archive contents before extraction to identify suspicious file paths containing ../ sequences
• Use isolated or sandboxed environments for DDEV operations if upgrade cannot be immediately performed
• Implement network-level controls to restrict DDEV's ability to download archives from external sources

# Upgrade DDEV to patched version
ddev version
# If version is below 1.25.2, upgrade using your package manager
# For macOS with Homebrew:
brew upgrade ddev
# Verify the upgrade
ddev version