Quenary Tugtainer up to 1.30.1 Notification Template Feature title_template/body_template special elements used in a template engine

Summaryinfo

A vulnerability categorized as very critical has been discovered in Quenary Tugtainer up to 1.30.1. Affected by this issue is some unknown functionality of the component Notification Template Feature. Executing a manipulation of the argument title_template/body_template can lead to improper neutralization of special elements used in a template engine. This vulnerability appears as CVE-2026-47752. The attack may be performed from remote. There is no available exploit.

Detailsinfo

A vulnerability was found in Quenary Tugtainer up to 1.30.1. It has been declared as very critical. This vulnerability affects an unknown functionality of the component Notification Template Feature. The manipulation of the argument title_template/body_template with an unknown input leads to a improper neutralization of special elements used in a template engine vulnerability. The CWE definition for the vulnerability is CWE-1336. The product uses a template engine to insert or process externally-influenced input, but it does not neutralize or incorrectly neutralizes special elements or syntax that can be interpreted as template expressions or other code directives when processed by the engine. As an impact it is known to affect confidentiality, integrity, and availability. CVE summarizes:

Tugtainer is a self-hosted app for automating updates of Docker containers. Versions prior to 1.30.2 are vulnerable to Server-Side Template Injection (SSTI) in the notification template feature. The `title_template` and `body_template` fields are rendered using an unsandboxed `jinja2.Environment`, allowing any authenticated user to execute arbitrary OS commands as root inside the container. Version 1.30.2 fixes the issue.

The advisory is shared for download at github.com. This vulnerability was named CVE-2026-47752 since 05/20/2026. The exploitation appears to be easy. The attack can be initiated remotely. There are known technical details, but no exploit is available. The current price for an exploit might be approx. USD $0-$5k (estimation calculated on 07/23/2026). The MITRE ATT&CK project declares the attack technique as T1221.

Upgrading to version 1.30.2 eliminates this vulnerability.

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Productinfo

Vendor

• Quenary

Name

• Tugtainer

Version

• 1.30.0
• 1.30.1

Website

• Product: https://github.com/Quenary/tugtainer/

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