nicolargo glances up to 4.5.1 REST/WebUI origin validation

Summaryinfo

A vulnerability categorized as problematic has been discovered in nicolargo glances up to 4.5.1. This affects an unknown function of the component REST/WebUI. Such manipulation leads to origin validation. This vulnerability is referenced as CVE-2026-32632. It is possible to launch the attack remotely. No exploit is available. It is advisable to upgrade the affected component.

Detailsinfo

A vulnerability was found in nicolargo glances up to 4.5.1 and classified as problematic. Affected by this issue is an unknown functionality of the component REST/WebUI. The manipulation with an unknown input leads to a origin validation vulnerability. Using CWE to declare the problem leads to CWE-346. The product does not properly verify that the source of data or communication is valid. Impacted is confidentiality, integrity, and availability. CVE summarizes:

Glances is an open-source system cross-platform monitoring tool. Glances recently added DNS rebinding protection for the MCP endpoint, but prior to version 4.5.2, the main REST/WebUI FastAPI application still accepts arbitrary `Host` headers and does not apply `TrustedHostMiddleware` or an equivalent host allowlist. As a result, the REST API, WebUI, and token endpoint remain reachable through attacker-controlled domains in classic DNS rebinding scenarios. Once the victim browser has rebound the attacker domain to the Glances service, same-origin policy no longer protects the API because the browser considers the rebinding domain to be the origin. This is a distinct issue from the previously reported default CORS weakness. CORS is not required for exploitation here because DNS rebinding causes the victim browser to treat the malicious domain as same-origin with the rebinding target. Version 4.5.2 contains a patch for the issue.

The advisory is available at github.com. This vulnerability is handled as CVE-2026-32632 since 03/12/2026. The exploitation is known to be difficult. The attack may be launched remotely. No form of authentication is required for exploitation. Successful exploitation requires user interaction by the victim. The technical details are unknown and an exploit is not available.

Upgrading to version 4.5.2 eliminates this vulnerability. The upgrade is hosted for download at github.com. Applying the patch 5850c564ee10804fdf884823b9c210eb954dd1f9 is able to eliminate this problem. The bugfix is ready for download at github.com. The best possible mitigation is suggested to be upgrading to the latest version.

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Productinfo

Vendor

• nicolargo

Name

• glances

Version

• 4.5.0
• 4.5.1

License

• open-source

Website

• Product: https://github.com/nicolargo/glances/

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