Shelf-nu Shelf up to 1.20.2 Asset Csv Content Import fetch imageUrl server-side request forgery

Summaryinfo

A vulnerability classified as critical has been found in Shelf-nu Shelf up to 1.20.2. The impacted element is the function fetch of the component Asset Csv Content Import. The manipulation of the argument imageUrl leads to server-side request forgery. This vulnerability is referenced as CVE-2026-54166. Remote exploitation of the attack is possible. No exploit is available. It is recommended to upgrade the affected component.

Detailsinfo

A vulnerability was found in Shelf-nu Shelf up to 1.20.2. It has been rated as critical. This issue affects the function fetch of the component Asset Csv Content Import. The manipulation of the argument imageUrl with an unknown input leads to a server-side request forgery vulnerability. Using CWE to declare the problem leads to CWE-918. The web server receives a URL or similar request from an upstream component and retrieves the contents of this URL, but it does not sufficiently ensure that the request is being sent to the expected destination. Impacted is confidentiality, integrity, and availability. The summary by CVE is:

Shelf is a platform for tracking physical assets. Prior to version 1.20.3, authenticated users with the `asset:import` permission can trigger server-side HTTP requests to attacker-controlled URLs through the Asset CSV Content Import feature. The `imageUrl` validation logic can be bypassed through multiple techniques, including image-extension suffixes, image-related path keywords, domain substring matching, and redirect chains. After validation, the server performs an unrestricted `fetch()` request to the supplied URL. This results in a Server-Side Request Forgery (SSRF) vulnerability that allows attackers to reach internal network services, cloud metadata endpoints, and arbitrary external hosts from the application's network context. Additionally, response bodies are fully buffered before size validation, creating a potential memory exhaustion vector. Version 1.20.3 patches the issue.

It is possible to read the advisory at github.com. The identification of this vulnerability is CVE-2026-54166 since 06/11/2026. The exploitation is known to be easy. The attack may be initiated remotely. Technical details of the vulnerability are known, but there is no available exploit.

Upgrading to version 1.20.3 eliminates this vulnerability.

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Productinfo

Vendor

• Shelf-nu

Name

• Shelf

Version

• 1.20.0
• 1.20.1
• 1.20.2

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CPE 2.2info

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