Path Traversal in Runtipi UserConfigController Enables Remote Code Execution

Publication date: 2026-01-29

Last updated on: 2026-02-26

Assigner: GitHub, Inc.

Description

Runtipi is a personal homeserver orchestrator. Starting in version 4.5.0 and prior to version 4.7.2, an unauthenticated Path Traversal vulnerability in the `UserConfigController` allows any remote user to overwrite the system's `docker-compose.yml` configuration file. By exploiting insecure URN parsing, an attacker can replace the primary stack configuration with a malicious one, resulting in full Remote Code Execution (RCE) and host filesystem compromise the next time the instance is restarted by the operator. Version 4.7.2 fixes the vulnerability.

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Meta Information

Published

2026-01-29

Last Modified

2026-02-26

Generated

2026-07-06

AI Q&A

2026-01-30

EPSS Evaluated

2026-07-05

NVD

CVE-2026-25116

Affected Vendors & Products

Vendor	Product	Version / Range
runtipi	runtipi	From 4.5.0 (inc) to 4.7.2 (exc)

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-306	The product does not perform any authentication for functionality that requires a provable user identity or consumes a significant amount of resources.
CWE-22	The product uses external input to construct a pathname that is intended to identify a file or directory that is located underneath a restricted parent directory, but the product does not properly neutralize special elements within the pathname that can cause the pathname to resolve to a location that is outside of the restricted directory.

Attack-Flow Graph

Executive Summary

This vulnerability is an unauthenticated Path Traversal issue in Runtipi versions 4.5.0 up to before 4.7.2. It exists in the UserConfigController and allows any remote user to overwrite the system's docker-compose.yml configuration file by exploiting insecure URN parsing. This lets an attacker replace the primary stack configuration with a malicious one, which can lead to full Remote Code Execution (RCE) and compromise of the host filesystem when the instance is restarted.

Impact Analysis

The vulnerability can allow an attacker to execute arbitrary code remotely on the host system by overwriting critical configuration files. This leads to a full compromise of the host filesystem and potentially the entire system, resulting in loss of integrity, availability, and confidentiality of the affected system.

Mitigation Strategies

Upgrade Runtipi to version 4.7.2 or later, as this version fixes the vulnerability. Additionally, avoid restarting the instance until the upgrade is applied to prevent exploitation of the malicious docker-compose.yml file.

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